Merge pull request #639 from heljoyLiu/new-plugin-gdbreader

reader: add gdbreader for GDB
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Trafalgar 2020-04-23 11:36:47 +08:00 committed by GitHub
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# DataX GDBReader
## 1. 快速介绍
GDBReader插件实现读取GDB实例数据的功能通过`Gremlin Client`连接远程GDB实例按配置提供的`label`生成查询DSL遍历点或边数据包括属性数据并将数据写入到Record中给到Writer使用。
## 2. 实现原理
GDBReader使用`Gremlin Client`连接GDB实例按`label`分不同Task取点或边数据。
单个Task中按`label`遍历点或边的id再切分范围分多次请求查询点或边和属性数据最后将点或边数据根据配置转换成指定格式记录发送给下游写插件。
GDBReader按`label`切分多个Task并发同一个`label`的数据批量异步获取来加快读取速度。如果配置读取的`label`列表为空任务启动前会从GDB查询所有`label`再切分Task。
## 3. 功能说明
GDB中点和边不同读取需要区分点和边点配置。
### 3.1 点配置样例
```
{
"job": {
"setting": {
"speed": {
"channel": 1
}
"errorLimit": {
"record": 1
}
},
"content": [
{
"reader": {
"name": "gdbreader",
"parameter": {
"host": "10.218.145.24",
"port": 8182,
"username": "***",
"password": "***",
"fetchBatchSize": 100,
"rangeSplitSize": 1000,
"labelType": "VERTEX",
"labels": ["label1", "label2"],
"column": [
{
"name": "id",
"type": "string",
"columnType": "primaryKey"
},
{
"name": "label",
"type": "string",
"columnType": "primaryLabel"
},
{
"name": "age",
"type": "int",
"columnType": "vertexProperty"
}
]
}
},
"writer": {
"name": "streamwriter",
"parameter": {
"print": true
}
}
}
]
}
}
```
### 3.2 边配置样例
```
{
"job": {
"setting": {
"speed": {
"channel": 1
},
"errorLimit": {
"record": 1
}
},
"content": [
{
"reader": {
"name": "gdbreader",
"parameter": {
"host": "10.218.145.24",
"port": 8182,
"username": "***",
"password": "***",
"fetchBatchSize": 100,
"rangeSplitSize": 1000,
"labelType": "EDGE",
"labels": ["label1", "label2"],
"column": [
{
"name": "id",
"type": "string",
"columnType": "primaryKey"
},
{
"name": "label",
"type": "string",
"columnType": "primaryLabel"
},
{
"name": "srcId",
"type": "string",
"columnType": "srcPrimaryKey"
},
{
"name": "srcLabel",
"type": "string",
"columnType": "srcPrimaryLabel"
},
{
"name": "dstId",
"type": "string",
"columnType": "srcPrimaryKey"
},
{
"name": "dstLabel",
"type": "string",
"columnType": "srcPrimaryLabel"
},
{
"name": "name",
"type": "string",
"columnType": "edgeProperty"
},
{
"name": "weight",
"type": "double",
"columnType": "edgeProperty"
}
]
}
},
"writer": {
"name": "streamwriter",
"parameter": {
"print": true
}
}
}
]
}
}
```
### 3.3 参数说明
* **host**
* 描述GDB实例连接地址对应'实例管理'->'基本信息'页面的网络地址
* 必选:是
* 默认值:无
* **port**
* 描述GDB实例连接地址对应的端口
* 必选:是
* 默认值8182
* **username**
* 描述GDB实例账号名
* 必选:是
* 默认值:无
* **password**
* 描述GDB实例账号名对应的密码
* 必选:是
* 默认值:无
* **fetchBatchSize**
* 描述一次GDB请求读取点或边的数量响应包含点或边以及属性
* 必选:是
* 默认值100
* **rangeSplitSize**
* 描述id遍历一次遍历请求扫描的id个数
* 必选:是
* 默认值10 \* fetchBatchSize
* **labels**
* 描述:标签数组,即需要导出的点或边标签,支持读取多个标签,用数组表示。如果留空([])表示GDB中所有点或边标签
* 必选:是
* 默认值:无
* **labelType**
* 描述:数据标签类型,支持点、边两种枚举值
* VERTEX表示点
* EDGE表示边
* 必选:是
* 默认值:无
* **column**
* 描述:点或边字段映射关系配置
* 必选:是
* 默认值:无
* **column -> name**
* 描述:点或边映射关系的字段名,指定属性时表示读取的属性名,读取其他字段时会被忽略
* 必选:是
* 默认值:无
* **column -> type**
* 描述:点或边映射关系的字段类型
* id, label在GDB中都是string类型配置非string类型时可能会转换失败
* 普通属性支持基础类型包括int, long, float, double, boolean, string
* GDBReader尽量将读取到的数据转换成配置要求的类型但转换失败会导致该条记录错误
* 必选:是
* 默认值:无
* **column -> columnType**
* 描述GDB点或边数据到列数据的映射关系支持以下枚举值
* primaryKey 表示该字段是点或边的id
* primaryLabel 表示该字段是点或边的label
* srcPrimaryKey 表示该字段是边关联的起点id只在读取边时使用
* srcPrimaryLabel 表示该字段是边关联的起点label只在读取边时使用
* dstPrimaryKey 表示该字段是边关联的终点id只在读取边时使用
* dstPrimaryLabel 表示该字段是边关联的终点label只在读取边时使用
* vertexProperty 表示该字段是点的属性只在读取点时使用应用到SET属性时只读取其中的一个属性值
* vertexJsonProperty 表示该字段是点的属性集合只在读取点时使用。属性集合使用JSON格式输出包含所有的属性不能与其他vertexProperty配置一起使用
* edgeProperty 表示该字段是边的属性,只在读取边时使用
* edgeJsonProperty 表示该字段是边的属性集合只在读取边时使用。属性集合使用JSON格式输出包含所有的属性不能与其他edgeProperty配置一起使用
* 必选:是
* 默认值:无
* vertexJsonProperty格式示例新增`c`字段区分SET属性但是SET属性只包含单个属性值时会标记成普通属性
```
{"properties":[
{"k":"name","t","string","v":"Jack","c":"set"},
{"k":"name","t","string","v":"Luck","c":"set"},
{"k":"age","t","int","v":"20","c":"single"}
]}
```
* edgeJsonProperty格式示例边不支持多值属性
```
{"properties":[
{"k":"created_at","t","long","v":"153498653"},
{"k":"weight","t","double","v":"3.14"}
]}
## 4 性能报告
(TODO)
## 5 使用约束
## 6 FAQ

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>datax-all</artifactId>
<groupId>com.alibaba.datax</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>gdbreader</artifactId>
<groupId>com.alibaba.datax</groupId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>com.alibaba.datax</groupId>
<artifactId>datax-common</artifactId>
<version>${datax-project-version}</version>
<exclusions>
<exclusion>
<artifactId>slf4j-log4j12</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.alibaba.datax</groupId>
<artifactId>datax-core</artifactId>
<version>${datax-project-version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<artifactId>slf4j-log4j12</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tinkerpop</groupId>
<artifactId>gremlin-driver</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.4.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.4.0</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- compiler plugin -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>${project-sourceEncoding}</encoding>
</configuration>
</plugin>
<!-- test case plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
<configuration>
<includes>
<include>**/*Test*.class</include>
</includes>
</configuration>
</plugin>
<!-- assembly plugin -->
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptors>
<descriptor>src/main/assembly/package.xml</descriptor>
</descriptors>
<finalName>datax</finalName>
</configuration>
<executions>
<execution>
<id>dwzip</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

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<assembly
xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0 http://maven.apache.org/xsd/assembly-1.1.0.xsd">
<id></id>
<formats>
<format>dir</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<fileSets>
<fileSet>
<directory>src/main/resources</directory>
<includes>
<include>plugin.json</include>
<include>plugin_job_template.json</include>
</includes>
<outputDirectory>plugin/reader/gdbreader</outputDirectory>
</fileSet>
<fileSet>
<directory>target/</directory>
<includes>
<include>gdbreader-0.0.1-SNAPSHOT.jar</include>
</includes>
<outputDirectory>plugin/reader/gdbreader</outputDirectory>
</fileSet>
</fileSets>
<dependencySets>
<dependencySet>
<useProjectArtifact>false</useProjectArtifact>
<outputDirectory>plugin/reader/gdbreader/libs</outputDirectory>
<scope>runtime</scope>
</dependencySet>
</dependencySets>
</assembly>

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package com.alibaba.datax.plugin.reader.gdbreader;
import com.alibaba.datax.common.element.Record;
import com.alibaba.datax.common.exception.DataXException;
import com.alibaba.datax.common.plugin.RecordSender;
import com.alibaba.datax.common.spi.Reader;
import com.alibaba.datax.common.util.Configuration;
import com.alibaba.datax.plugin.reader.gdbreader.mapping.DefaultGdbMapper;
import com.alibaba.datax.plugin.reader.gdbreader.mapping.MappingRule;
import com.alibaba.datax.plugin.reader.gdbreader.mapping.MappingRuleFactory;
import com.alibaba.datax.plugin.reader.gdbreader.model.GdbElement;
import com.alibaba.datax.plugin.reader.gdbreader.model.GdbGraph;
import com.alibaba.datax.plugin.reader.gdbreader.model.ScriptGdbGraph;
import com.alibaba.datax.plugin.reader.gdbreader.util.ConfigHelper;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.LinkedList;
import java.util.List;
public class GdbReader extends Reader {
private final static int DEFAULT_FETCH_BATCH_SIZE = 200;
private static GdbGraph graph;
private static Key.ExportType exportType;
/**
* Job 中的方法仅执行一次Task 中方法会由框架启动多个 Task 线程并行执行
* <p/>
* 整个 Reader 执行流程是
* <pre>
* Job类init-->prepare-->split
*
* Task类init-->prepare-->startRead-->post-->destroy
* Task类init-->prepare-->startRead-->post-->destroy
*
* Job类post-->destroy
* </pre>
*/
public static class Job extends Reader.Job {
private static final Logger LOG = LoggerFactory.getLogger(Job.class);
private Configuration jobConfig = null;
@Override
public void init() {
this.jobConfig = super.getPluginJobConf();
/**
* 注意此方法仅执行一次
* 最佳实践通常在这里对用户的配置进行校验是否缺失必填项有无错误值有没有无关配置项...
* 并给出清晰的报错/警告提示校验通常建议采用静态工具类进行以保证本类结构清晰
*/
ConfigHelper.assertGdbClient(jobConfig);
ConfigHelper.assertLabels(jobConfig);
try {
exportType = Key.ExportType.valueOf(jobConfig.getString(Key.EXPORT_TYPE));
} catch (NullPointerException | IllegalArgumentException e) {
throw DataXException.asDataXException(GdbReaderErrorCode.BAD_CONFIG_VALUE, Key.EXPORT_TYPE);
}
}
@Override
public void prepare() {
/**
* 注意此方法仅执行一次
* 最佳实践如果 Job 中有需要进行数据同步之前的处理可以在此处完成如果没有必要则可以直接去掉
*/
try {
graph = new ScriptGdbGraph(jobConfig, exportType);
} catch (RuntimeException e) {
throw DataXException.asDataXException(GdbReaderErrorCode.FAIL_CLIENT_CONNECT, e.getMessage());
}
}
@Override
public List<Configuration> split(int adviceNumber) {
/**
* 注意此方法仅执行一次
* 最佳实践通常采用工具静态类完成把 Job 配置切分成多个 Task 配置的工作
* 这里的 adviceNumber 是框架根据用户的同步速度的要求建议的切分份数仅供参考不是强制必须切分的份数
*/
List<String> labels = ConfigHelper.assertLabels(jobConfig);
/**
* 配置label列表为空时尝试查询GDB中所有label添加到读取列表
*/
if (labels.isEmpty()) {
try {
labels.addAll(graph.getLabels().keySet());
} catch (RuntimeException ex) {
throw DataXException.asDataXException(GdbReaderErrorCode.FAIL_FETCH_LABELS, ex.getMessage());
}
}
if (labels.isEmpty()) {
throw DataXException.asDataXException(GdbReaderErrorCode.FAIL_FETCH_LABELS, "none labels to read");
}
return ConfigHelper.splitConfig(jobConfig, labels);
}
@Override
public void post() {
/**
* 注意此方法仅执行一次
* 最佳实践如果 Job 中有需要进行数据同步之后的后续处理可以在此处完成
*/
}
@Override
public void destroy() {
/**
* 注意此方法仅执行一次
* 最佳实践通常配合 Job 中的 post() 方法一起完成 Job 的资源释放
*/
try {
graph.close();
} catch (Exception ex) {
LOG.error("Failed to close client : {}", ex);
}
}
}
public static class Task extends Reader.Task {
private static final Logger LOG = LoggerFactory.getLogger(Task.class);
private static MappingRule rule;
private Configuration taskConfig;
private String fetchLabel = null;
private int rangeSplitSize;
private int fetchBatchSize;
@Override
public void init() {
this.taskConfig = super.getPluginJobConf();
/**
* 注意此方法每个 Task 都会执行一次
* 最佳实践此处通过对 taskConfig 配置的读取进而初始化一些资源为 startRead()做准备
*/
fetchLabel = taskConfig.getString(Key.LABEL);
fetchBatchSize = taskConfig.getInt(Key.FETCH_BATCH_SIZE, DEFAULT_FETCH_BATCH_SIZE);
rangeSplitSize = taskConfig.getInt(Key.RANGE_SPLIT_SIZE, fetchBatchSize * 10);
rule = MappingRuleFactory.getInstance().create(taskConfig, exportType);
}
@Override
public void prepare() {
/**
* 注意此方法仅执行一次
* 最佳实践如果 Job 中有需要进行数据同步之后的处理可以在此处完成如果没有必要则可以直接去掉
*/
}
@Override
public void startRead(RecordSender recordSender) {
/**
* 注意此方法每个 Task 都会执行一次
* 最佳实践此处适当封装确保简洁清晰完成数据读取工作
*/
String start = "";
while (true) {
List<String> ids;
try {
ids = graph.fetchIds(fetchLabel, start, rangeSplitSize);
if (ids.isEmpty()) {
break;
}
start = ids.get(ids.size() - 1);
} catch (Exception ex) {
throw DataXException.asDataXException(GdbReaderErrorCode.FAIL_FETCH_IDS, ex.getMessage());
}
// send range fetch async
int count = ids.size();
List<ResultSet> resultSets = new LinkedList<>();
for (int pos = 0; pos < count; pos += fetchBatchSize) {
int rangeSize = Math.min(fetchBatchSize, count - pos);
String endId = ids.get(pos + rangeSize - 1);
String beginId = ids.get(pos);
List<String> propNames = rule.isHasProperty() ? rule.getPropertyNames() : null;
try {
resultSets.add(graph.fetchElementsAsync(fetchLabel, beginId, endId, propNames));
} catch (Exception ex) {
// just print error logs and continues
LOG.error("failed to request label: {}, start: {}, end: {}, e: {}", fetchLabel, beginId, endId, ex);
}
}
// get range fetch dsl results
resultSets.forEach(results -> {
try {
List<GdbElement> elements = graph.getElement(results);
elements.forEach(element -> {
Record record = recordSender.createRecord();
DefaultGdbMapper.getMapper(rule).accept(element, record);
recordSender.sendToWriter(record);
});
recordSender.flush();
} catch (Exception ex) {
LOG.error("failed to send records e {}", ex);
}
});
}
}
@Override
public void post() {
/**
* 注意此方法每个 Task 都会执行一次
* 最佳实践如果 Task 中有需要进行数据同步之后的后续处理可以在此处完成
*/
}
@Override
public void destroy() {
/**
* 注意此方法每个 Task 都会执行一次
* 最佳实践通常配合Task 中的 post() 方法一起完成 Task 的资源释放
*/
}
}
}

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package com.alibaba.datax.plugin.reader.gdbreader;
import com.alibaba.datax.common.spi.ErrorCode;
public enum GdbReaderErrorCode implements ErrorCode {
/**
*
*/
BAD_CONFIG_VALUE("GdbReader-00", "The value you configured is invalid."),
FAIL_CLIENT_CONNECT("GdbReader-02", "GDB connection is abnormal."),
UNSUPPORTED_TYPE("GdbReader-03", "Unsupported data type conversion."),
FAIL_FETCH_LABELS("GdbReader-04", "Error pulling all labels, it is recommended to configure the specified label pull."),
FAIL_FETCH_IDS("GdbReader-05", "Pull range id error."),
;
private final String code;
private final String description;
private GdbReaderErrorCode(String code, String description) {
this.code = code;
this.description = description;
}
@Override
public String getCode() {
return this.code;
}
@Override
public String getDescription() {
return this.description;
}
@Override
public String toString() {
return String.format("Code:[%s], Description:[%s]. ", this.code,
this.description);
}
}

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package com.alibaba.datax.plugin.reader.gdbreader;
public final class Key {
/**
* 此处声明插件用到的需要插件使用者提供的配置项
*/
public final static String HOST = "host";
public final static String PORT = "port";
public final static String USERNAME = "username";
public static final String PASSWORD = "password";
public static final String LABEL = "labels";
public static final String EXPORT_TYPE = "labelType";
public static final String RANGE_SPLIT_SIZE = "RangeSplitSize";
public static final String FETCH_BATCH_SIZE = "fetchBatchSize";
public static final String COLUMN = "column";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_TYPE = "type";
public static final String COLUMN_NODE_TYPE = "columnType";
public enum ExportType {
/**
* Import vertices
*/
VERTEX,
/**
* Import edges
*/
EDGE
}
public enum ColumnType {
/**
* vertex or edge id
*/
primaryKey,
/**
* vertex or edge label
*/
primaryLabel,
/**
* vertex property
*/
vertexProperty,
/**
* collects all vertex property to Json list
*/
vertexJsonProperty,
/**
* start vertex id of edge
*/
srcPrimaryKey,
/**
* start vertex label of edge
*/
srcPrimaryLabel,
/**
* end vertex id of edge
*/
dstPrimaryKey,
/**
* end vertex label of edge
*/
dstPrimaryLabel,
/**
* edge property
*/
edgeProperty,
/**
* collects all edge property to Json list
*/
edgeJsonProperty,
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.mapping;
import com.alibaba.datax.common.element.Record;
import com.alibaba.datax.plugin.reader.gdbreader.model.GdbElement;
import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceProperty;
import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceVertexProperty;
import java.util.List;
import java.util.Map;
import java.util.function.BiConsumer;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public class DefaultGdbMapper {
public static BiConsumer<GdbElement, Record> getMapper(MappingRule rule) {
return (gdbElement, record) -> rule.getColumns().forEach(columnMappingRule -> {
Object value = null;
ValueType type = columnMappingRule.getValueType();
String name = columnMappingRule.getName();
Map<String, Object> props = gdbElement.getProperties();
switch (columnMappingRule.getColumnType()) {
case dstPrimaryKey:
value = gdbElement.getTo();
break;
case srcPrimaryKey:
value = gdbElement.getFrom();
break;
case primaryKey:
value = gdbElement.getId();
break;
case primaryLabel:
value = gdbElement.getLabel();
break;
case dstPrimaryLabel:
value = gdbElement.getToLabel();
break;
case srcPrimaryLabel:
value = gdbElement.getFromLabel();
break;
case vertexProperty:
value = forVertexOnePropertyValue().apply(props.get(name));
break;
case edgeProperty:
value = forEdgePropertyValue().apply(props.get(name));
break;
case edgeJsonProperty:
value = forEdgeJsonProperties().apply(props);
break;
case vertexJsonProperty:
value = forVertexJsonProperties().apply(props);
break;
default:
break;
}
record.addColumn(type.applyObject(value));
});
}
/**
* parser ReferenceProperty value for edge
*
* @return property value
*/
private static Function<Object, Object> forEdgePropertyValue() {
return prop -> {
if (prop instanceof ReferenceProperty) {
return ((ReferenceProperty) prop).value();
}
return null;
};
}
/**
* parser ReferenceVertexProperty value for vertex
*
* @return the first property value in list
*/
private static Function<Object, Object> forVertexOnePropertyValue() {
return props -> {
if (props instanceof List<?>) {
// get the first one property if more than one
Object o = ((List) props).get(0);
if (o instanceof ReferenceVertexProperty) {
return ((ReferenceVertexProperty) o).value();
}
}
return null;
};
}
/**
* parser all edge properties to json string
*
* @return json string
*/
private static Function<Map<String, Object>, String> forEdgeJsonProperties() {
return props -> "{\"properties\":[" +
props.entrySet().stream().filter(p -> p.getValue() instanceof ReferenceProperty)
.map(p -> "{\"k\":\"" + ((ReferenceProperty) p.getValue()).key() + "\"," +
"\"t\":\"" + ((ReferenceProperty) p.getValue()).value().getClass().getSimpleName().toLowerCase() + "\"," +
"\"v\":\"" + String.valueOf(((ReferenceProperty) p.getValue()).value()) + "\"}")
.collect(Collectors.joining(",")) +
"]}";
}
/**
* parser all vertex properties to json string, include set-property
*
* @return json string
*/
private static Function<Map<String, Object>, String> forVertexJsonProperties() {
return props -> "{\"properties\":[" +
props.entrySet().stream().filter(p -> p.getValue() instanceof List<?>)
.map(p -> forVertexPropertyStr().apply((List<?>) p.getValue()))
.collect(Collectors.joining(",")) +
"]}";
}
/**
* parser one vertex property to json string item, set 'cardinality'
*
* @return json string item
*/
private static Function<List<?>, String> forVertexPropertyStr() {
return vp -> {
final String setFlag = vp.size() > 1 ? "set" : "single";
return vp.stream().filter(p -> p instanceof ReferenceVertexProperty)
.map(p -> "{\"k\":\"" + ((ReferenceVertexProperty) p).key() + "\"," +
"\"t\":\"" + ((ReferenceVertexProperty) p).value().getClass().getSimpleName().toLowerCase() + "\"," +
"\"v\":\"" + String.valueOf(((ReferenceVertexProperty) p).value()) + "\"," +
"\"c\":\"" + setFlag + "\"}")
.collect(Collectors.joining(","));
};
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.mapping;
import com.alibaba.datax.common.exception.DataXException;
import com.alibaba.datax.plugin.reader.gdbreader.GdbReaderErrorCode;
import com.alibaba.datax.plugin.reader.gdbreader.Key.ColumnType;
import com.alibaba.datax.plugin.reader.gdbreader.Key.ExportType;
import lombok.Data;
import java.util.ArrayList;
import java.util.List;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
@Data
public class MappingRule {
private boolean hasRelation = false;
private boolean hasProperty = false;
private ExportType type = ExportType.VERTEX;
/**
* property names for property key-value
*/
private List<String> propertyNames = new ArrayList<>();
private List<ColumnMappingRule> columns = new ArrayList<>();
void addColumn(ColumnType columnType, ValueType type, String name) {
ColumnMappingRule rule = new ColumnMappingRule();
rule.setColumnType(columnType);
rule.setName(name);
rule.setValueType(type);
if (columnType == ColumnType.vertexProperty || columnType == ColumnType.edgeProperty) {
propertyNames.add(name);
hasProperty = true;
}
boolean hasTo = columnType == ColumnType.dstPrimaryKey || columnType == ColumnType.dstPrimaryLabel;
boolean hasFrom = columnType == ColumnType.srcPrimaryKey || columnType == ColumnType.srcPrimaryLabel;
if (hasTo || hasFrom) {
hasRelation = true;
}
columns.add(rule);
}
void addJsonColumn(ColumnType columnType) {
ColumnMappingRule rule = new ColumnMappingRule();
rule.setColumnType(columnType);
rule.setName("json");
rule.setValueType(ValueType.STRING);
if (!propertyNames.isEmpty()) {
throw DataXException.asDataXException(GdbReaderErrorCode.BAD_CONFIG_VALUE, "JsonProperties should be only property");
}
columns.add(rule);
hasProperty = true;
}
@Data
protected static class ColumnMappingRule {
private String name = null;
private ValueType valueType = null;
private ColumnType columnType = null;
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.mapping;
import com.alibaba.datax.common.exception.DataXException;
import com.alibaba.datax.common.util.Configuration;
import com.alibaba.datax.plugin.reader.gdbreader.GdbReaderErrorCode;
import com.alibaba.datax.plugin.reader.gdbreader.Key;
import com.alibaba.datax.plugin.reader.gdbreader.Key.ColumnType;
import com.alibaba.datax.plugin.reader.gdbreader.Key.ExportType;
import com.alibaba.datax.plugin.reader.gdbreader.util.ConfigHelper;
import java.util.List;
/**
* @author : Liu Jianping
* @date : 2019/9/20
*/
public class MappingRuleFactory {
private static final MappingRuleFactory instance = new MappingRuleFactory();
public static MappingRuleFactory getInstance() {
return instance;
}
public MappingRule create(Configuration config, ExportType exportType) {
MappingRule rule = new MappingRule();
rule.setType(exportType);
List<Configuration> configurationList = config.getListConfiguration(Key.COLUMN);
for (Configuration column : configurationList) {
ColumnType columnType;
try {
columnType = ColumnType.valueOf(column.getString(Key.COLUMN_NODE_TYPE));
} catch (NullPointerException | IllegalArgumentException e) {
throw DataXException.asDataXException(GdbReaderErrorCode.BAD_CONFIG_VALUE, Key.COLUMN_NODE_TYPE);
}
if (exportType == ExportType.VERTEX) {
// only id/label/property column allow when vertex
ConfigHelper.assertConfig(Key.COLUMN_NODE_TYPE, () ->
columnType == ColumnType.primaryKey || columnType == ColumnType.primaryLabel
|| columnType == ColumnType.vertexProperty || columnType == ColumnType.vertexJsonProperty);
} else if (exportType == ExportType.EDGE) {
// edge
ConfigHelper.assertConfig(Key.COLUMN_NODE_TYPE, () ->
columnType == ColumnType.primaryKey || columnType == ColumnType.primaryLabel
|| columnType == ColumnType.srcPrimaryKey || columnType == ColumnType.srcPrimaryLabel
|| columnType == ColumnType.dstPrimaryKey || columnType == ColumnType.dstPrimaryLabel
|| columnType == ColumnType.edgeProperty || columnType == ColumnType.edgeJsonProperty);
}
if (columnType == ColumnType.edgeProperty || columnType == ColumnType.vertexProperty) {
String name = column.getString(Key.COLUMN_NAME);
ValueType propType = ValueType.fromShortName(column.getString(Key.COLUMN_TYPE));
ConfigHelper.assertConfig(Key.COLUMN_NAME, () -> name != null);
if (propType == null) {
throw DataXException.asDataXException(GdbReaderErrorCode.UNSUPPORTED_TYPE, Key.COLUMN_TYPE);
}
rule.addColumn(columnType, propType, name);
} else if (columnType == ColumnType.vertexJsonProperty || columnType == ColumnType.edgeJsonProperty) {
rule.addJsonColumn(columnType);
} else {
rule.addColumn(columnType, ValueType.STRING, null);
}
}
return rule;
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.mapping;
import com.alibaba.datax.common.element.BoolColumn;
import com.alibaba.datax.common.element.Column;
import com.alibaba.datax.common.element.DoubleColumn;
import com.alibaba.datax.common.element.LongColumn;
import com.alibaba.datax.common.element.StringColumn;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public enum ValueType {
/**
* transfer gdb element object value to DataX Column data
* <p>
* int, long -> LongColumn
* float, double -> DoubleColumn
* bool -> BooleanColumn
* string -> StringColumn
*/
INT(Integer.class, "int", ValueTypeHolder::longColumnMapper),
INTEGER(Integer.class, "integer", ValueTypeHolder::longColumnMapper),
LONG(Long.class, "long", ValueTypeHolder::longColumnMapper),
DOUBLE(Double.class, "double", ValueTypeHolder::doubleColumnMapper),
FLOAT(Float.class, "float", ValueTypeHolder::doubleColumnMapper),
BOOLEAN(Boolean.class, "boolean", ValueTypeHolder::boolColumnMapper),
STRING(String.class, "string", ValueTypeHolder::stringColumnMapper),
;
private Class<?> type = null;
private String shortName = null;
private Function<Object, Column> columnFunc = null;
ValueType(Class<?> type, String name, Function<Object, Column> columnFunc) {
this.type = type;
this.shortName = name;
this.columnFunc = columnFunc;
ValueTypeHolder.shortName2type.put(shortName, this);
}
public static ValueType fromShortName(String name) {
return ValueTypeHolder.shortName2type.get(name);
}
public Column applyObject(Object value) {
if (value == null) {
return null;
}
return columnFunc.apply(value);
}
private static class ValueTypeHolder {
private static Map<String, ValueType> shortName2type = new HashMap<>();
private static LongColumn longColumnMapper(Object o) {
long v;
if (o instanceof Integer) {
v = (int) o;
} else if (o instanceof Long) {
v = (long) o;
} else if (o instanceof String) {
v = Long.valueOf((String) o);
} else {
throw new RuntimeException("Failed to cast " + o.getClass() + " to Long");
}
return new LongColumn(v);
}
private static DoubleColumn doubleColumnMapper(Object o) {
double v;
if (o instanceof Integer) {
v = (double) (int) o;
} else if (o instanceof Long) {
v = (double) (long) o;
} else if (o instanceof Float) {
v = (double) (float) o;
} else if (o instanceof Double) {
v = (double) o;
} else if (o instanceof String) {
v = Double.valueOf((String) o);
} else {
throw new RuntimeException("Failed to cast " + o.getClass() + " to Double");
}
return new DoubleColumn(v);
}
private static BoolColumn boolColumnMapper(Object o) {
boolean v;
if (o instanceof Integer) {
v = ((int) o != 0);
} else if (o instanceof Long) {
v = ((long) o != 0);
} else if (o instanceof Boolean) {
v = (boolean) o;
} else if (o instanceof String) {
v = Boolean.valueOf((String) o);
} else {
throw new RuntimeException("Failed to cast " + o.getClass() + " to Boolean");
}
return new BoolColumn(v);
}
private static StringColumn stringColumnMapper(Object o) {
if (o instanceof String) {
return new StringColumn((String) o);
} else {
return new StringColumn(String.valueOf(o));
}
}
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.model;
import com.alibaba.datax.common.util.Configuration;
import com.alibaba.datax.plugin.reader.gdbreader.Key;
import org.apache.tinkerpop.gremlin.driver.Client;
import org.apache.tinkerpop.gremlin.driver.Cluster;
import org.apache.tinkerpop.gremlin.driver.RequestOptions;
import org.apache.tinkerpop.gremlin.driver.Result;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import org.apache.tinkerpop.gremlin.driver.ser.Serializers;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public abstract class AbstractGdbGraph implements GdbGraph {
final static int DEFAULT_TIMEOUT = 30000;
private static final Logger log = LoggerFactory.getLogger(AbstractGdbGraph.class);
private Client client;
AbstractGdbGraph() {
}
AbstractGdbGraph(Configuration config) {
log.info("init graphdb client");
String host = config.getString(Key.HOST);
int port = config.getInt(Key.PORT);
String username = config.getString(Key.USERNAME);
String password = config.getString(Key.PASSWORD);
try {
Cluster cluster = Cluster.build(host).port(port).credentials(username, password)
.serializer(Serializers.GRAPHBINARY_V1D0)
.maxContentLength(1024 * 1024)
.resultIterationBatchSize(64)
.create();
client = cluster.connect().init();
warmClient();
} catch (RuntimeException e) {
log.error("Failed to connect to GDB {}:{}, due to {}", host, port, e);
throw e;
}
}
protected List<Result> runInternal(String dsl, Map<String, Object> params) throws Exception {
return runInternalAsync(dsl, params).all().get(DEFAULT_TIMEOUT + 1000, TimeUnit.MILLISECONDS);
}
protected ResultSet runInternalAsync(String dsl, Map<String, Object> params) throws Exception {
RequestOptions.Builder options = RequestOptions.build().timeout(DEFAULT_TIMEOUT);
if (params != null && !params.isEmpty()) {
params.forEach(options::addParameter);
}
return client.submitAsync(dsl, options.create()).get(DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS);
}
private void warmClient() {
try {
runInternal("g.V('test')", null);
log.info("warm graphdb client over");
} catch (Exception e) {
log.error("warmClient error");
throw new RuntimeException(e);
}
}
@Override
public void close() throws Exception {
if (client != null) {
log.info("close graphdb client");
client.close();
}
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.model;
import lombok.Data;
import java.util.HashMap;
import java.util.Map;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
@Data
public class GdbElement {
String id = null;
String label = null;
String to = null;
String from = null;
String toLabel = null;
String fromLabel = null;
Map<String, Object> properties = new HashMap<>();
public GdbElement() {
}
public GdbElement(String id, String label) {
this.id = id;
this.label = label;
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.model;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import java.util.List;
import java.util.Map;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public interface GdbGraph extends AutoCloseable {
/**
* Get All labels of GraphDB
*
* @return labels map included numbers
*/
Map<String, Long> getLabels();
/**
* Get the Ids list of special 'label', size up to 'limit'
*
* @param label is Label of Vertex or Edge
* @param start of Ids range to get
* @param limit size of Ids list
* @return Ids list
*/
List<String> fetchIds(String label, String start, long limit);
/**
* Fetch element in async mode, just send query dsl to server
*
* @param label node label to filter
* @param start range begin(included)
* @param end range end(included)
* @param propNames propKey list to fetch
* @return future to get result later
*/
ResultSet fetchElementsAsync(String label, String start, String end, List<String> propNames);
/**
* Get get element from Response @{ResultSet}
*
* @param results Response of Server
* @return element sets
*/
List<GdbElement> getElement(ResultSet results);
/**
* close graph client
*
* @throws Exception if fails
*/
@Override
void close() throws Exception;
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.model;
import com.alibaba.datax.common.util.Configuration;
import com.alibaba.datax.plugin.reader.gdbreader.Key.ExportType;
import org.apache.tinkerpop.gremlin.driver.Result;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceEdge;
import org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceVertex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public class ScriptGdbGraph extends AbstractGdbGraph {
private static final Logger log = LoggerFactory.getLogger(ScriptGdbGraph.class);
private final static String LABEL = "GDB___LABEL";
private final static String START_ID = "GDB___ID";
private final static String END_ID = "GDB___ID_END";
private final static String LIMIT = "GDB___LIMIT";
private final static String FETCH_VERTEX_IDS_DSL = "g.V().hasLabel(" + LABEL + ").has(id, gt(" + START_ID + ")).limit(" + LIMIT + ").id()";
private final static String FETCH_EDGE_IDS_DSL = "g.E().hasLabel(" + LABEL + ").has(id, gt(" + START_ID + ")).limit(" + LIMIT + ").id()";
private final static String FETCH_VERTEX_LABELS_DSL = "g.V().groupCount().by(label)";
private final static String FETCH_EDGE_LABELS_DSL = "g.E().groupCount().by(label)";
/**
* fetch node range [START_ID, END_ID]
*/
private final static String FETCH_RANGE_VERTEX_DSL = "g.V().hasLabel(" + LABEL + ").has(id, gte(" + START_ID + ")).has(id, lte(" + END_ID + "))";
private final static String FETCH_RANGE_EDGE_DSL = "g.E().hasLabel(" + LABEL + ").has(id, gte(" + START_ID + ")).has(id, lte(" + END_ID + "))";
private final static String PART_WITH_PROP_DSL = ".as('a').project('node', 'props').by(select('a')).by(select('a').propertyMap(";
private final ExportType exportType;
public ScriptGdbGraph(ExportType exportType) {
super();
this.exportType = exportType;
}
public ScriptGdbGraph(Configuration config, ExportType exportType) {
super(config);
this.exportType = exportType;
}
@Override
public List<String> fetchIds(final String label, final String start, long limit) {
Map<String, Object> params = new HashMap<String, Object>(3) {{
put(LABEL, label);
put(START_ID, start);
put(LIMIT, limit);
}};
String fetchDsl = exportType == ExportType.VERTEX ? FETCH_VERTEX_IDS_DSL : FETCH_EDGE_IDS_DSL;
List<String> ids = new ArrayList<>();
try {
List<Result> results = runInternal(fetchDsl, params);
// transfer result to id string
results.forEach(id -> ids.add(id.getString()));
} catch (Exception e) {
log.error("fetch range node failed, label {}, start {}", label, start);
throw new RuntimeException(e);
}
return ids;
}
@Override
public ResultSet fetchElementsAsync(final String label, final String start, final String end, final List<String> propNames) {
Map<String, Object> params = new HashMap<>(3);
params.put(LABEL, label);
params.put(START_ID, start);
params.put(END_ID, end);
String prefixDsl = exportType == ExportType.VERTEX ? FETCH_RANGE_VERTEX_DSL : FETCH_RANGE_EDGE_DSL;
StringBuilder fetchDsl = new StringBuilder(prefixDsl);
if (propNames != null) {
fetchDsl.append(PART_WITH_PROP_DSL);
for (int i = 0; i < propNames.size(); i++) {
String propName = "GDB___PK" + String.valueOf(i);
params.put(propName, propNames.get(i));
fetchDsl.append(propName);
if (i != propNames.size() - 1) {
fetchDsl.append(", ");
}
}
fetchDsl.append("))");
}
try {
return runInternalAsync(fetchDsl.toString(), params);
} catch (Exception e) {
log.error("Failed to fetch range node startId {}, end {} , e {}", start, end, e);
throw new RuntimeException(e);
}
}
@Override
@SuppressWarnings("unchecked")
public List<GdbElement> getElement(ResultSet results) {
List<GdbElement> elements = new LinkedList<>();
try {
List<Result> resultList = results.all().get(DEFAULT_TIMEOUT + 1000, TimeUnit.MILLISECONDS);
resultList.forEach(n -> {
Object o = n.getObject();
GdbElement element = new GdbElement();
if (o instanceof Map) {
// project response
Object node = ((Map) o).get("node");
Object props = ((Map) o).get("props");
mapNodeToElement(node, element);
mapPropToElement((Map<String, Object>) props, element);
} else {
// range node response
mapNodeToElement(n.getObject(), element);
}
if (element.getId() != null) {
elements.add(element);
}
});
} catch (Exception e) {
log.error("Failed to get node: {}", e);
throw new RuntimeException(e);
}
return elements;
}
private void mapNodeToElement(Object node, GdbElement element) {
if (node instanceof ReferenceVertex) {
ReferenceVertex v = (ReferenceVertex) node;
element.setId((String) v.id());
element.setLabel(v.label());
} else if (node instanceof ReferenceEdge) {
ReferenceEdge e = (ReferenceEdge) node;
element.setId((String) e.id());
element.setLabel(e.label());
element.setTo((String) e.inVertex().id());
element.setToLabel(e.inVertex().label());
element.setFrom((String) e.outVertex().id());
element.setFromLabel(e.outVertex().label());
}
}
private void mapPropToElement(Map<String, Object> props, GdbElement element) {
element.setProperties(props);
}
@Override
public Map<String, Long> getLabels() {
String dsl = exportType == ExportType.VERTEX ? FETCH_VERTEX_LABELS_DSL : FETCH_EDGE_LABELS_DSL;
try {
List<Result> results = runInternal(dsl, null);
Map<String, Long> labelMap = new HashMap<>(2);
Map<?, ?> labels = results.get(0).get(Map.class);
labels.forEach((k, v) -> {
String label = (String) k;
Long count = (Long) v;
labelMap.put(label, count);
});
return labelMap;
} catch (Exception e) {
log.error("Failed to fetch label list, please give special labels and run again, e {}", e);
throw new RuntimeException(e);
}
}
}

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/*
* (C) 2019-present Alibaba Group Holding Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
package com.alibaba.datax.plugin.reader.gdbreader.util;
import com.alibaba.datax.common.exception.DataXException;
import com.alibaba.datax.common.util.Configuration;
import com.alibaba.datax.plugin.reader.gdbreader.GdbReaderErrorCode;
import com.alibaba.datax.plugin.reader.gdbreader.Key;
import org.apache.commons.lang3.StringUtils;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;
/**
* @author : Liu Jianping
* @date : 2019/9/6
*/
public interface ConfigHelper {
static void assertConfig(String key, Supplier<Boolean> f) {
if (!f.get()) {
throw DataXException.asDataXException(GdbReaderErrorCode.BAD_CONFIG_VALUE, key);
}
}
static void assertHasContent(Configuration config, String key) {
assertConfig(key, () -> StringUtils.isNotBlank(config.getString(key)));
}
static void assertGdbClient(Configuration config) {
assertHasContent(config, Key.HOST);
assertConfig(Key.PORT, () -> config.getInt(Key.PORT) > 0);
assertHasContent(config, Key.USERNAME);
assertHasContent(config, Key.PASSWORD);
}
static List<String> assertLabels(Configuration config) {
Object labels = config.get(Key.LABEL);
if (!(labels instanceof List)) {
throw DataXException.asDataXException(GdbReaderErrorCode.BAD_CONFIG_VALUE, "labels should be List");
}
List<?> list = (List<?>) labels;
List<String> configLabels = new ArrayList<>(0);
list.forEach(n -> configLabels.add(String.valueOf(n)));
return configLabels;
}
static List<Configuration> splitConfig(Configuration config, List<String> labels) {
List<Configuration> configs = new ArrayList<>();
for (String label : labels) {
Configuration conf = config.clone();
conf.set(Key.LABEL, label);
configs.add(conf);
}
return configs;
}
static Configuration fromClasspath(String name) {
try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(name)) {
return Configuration.from(is);
} catch (IOException e) {
throw new IllegalArgumentException("File not found: " + name);
}
}
}

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@ -0,0 +1,6 @@
{
"name": "gdbreader",
"class": "com.alibaba.datax.plugin.reader.gdbreader.GdbReader",
"description": "useScene: prod. mechanism: connect GDB with gremlin-client, execute 'g.V().propertyMap() or g.E().propertyMap()' to get record",
"developer": "alibaba"
}

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@ -0,0 +1,77 @@
{
"job": {
"setting": {
"speed": {
"channel": 1
},
"errorLimit": {
"record": 1
}
},
"content": [
{
"reader": {
"name": "gdbreader",
"parameter": {
"host": "10.218.145.24",
"port": 8182,
"username": "***",
"password": "***",
"labelType": "EDGE",
"labels": ["label1", "label2"],
"column": [
{
"name": "id",
"type": "string",
"columnType": "primaryKey"
},
{
"name": "label",
"type": "string",
"columnType": "primaryLabel"
},
{
"name": "srcId",
"type": "string",
"columnType": "srcPrimaryKey"
},
{
"name": "srcLabel",
"type": "string",
"columnType": "srcPrimaryLabel"
},
{
"name": "dstId",
"type": "string",
"columnType": "srcPrimaryKey"
},
{
"name": "dstLabel",
"type": "string",
"columnType": "srcPrimaryLabel"
},
{
"name": "name",
"type": "string",
"columnType": "edgeProperty"
},
{
"name": "weight",
"type": "double",
"columnType": "edgeProperty"
}
]
}
},
"writer": {
"name": "streamwriter",
"parameter": {
"print": true
}
}
}
]
}
}

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@ -66,6 +66,7 @@
<module>tsdbreader</module> <module>tsdbreader</module>
<module>opentsdbreader</module> <module>opentsdbreader</module>
<module>cassandrareader</module> <module>cassandrareader</module>
<module>gdbreader</module>
<!-- writer --> <!-- writer -->
<module>mysqlwriter</module> <module>mysqlwriter</module>