Titan Graph DataBase 研究 (三)----Java API使用 上

上一篇说道了如何TitanServer的发布,那么这一章就来说说如何用JavaApI操作Titan,话不多说直接上代码
pom.xml

<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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.run.tatin</groupId>
    <artifactId>tatindemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>tatindemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <titan.version>1.0.0</titan.version>
    </properties>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>jdk.tools</groupId>
            <artifactId>jdk.tools</artifactId>
            <version>1.8</version>
            <scope>system</scope>
            <systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <!-- titan核心依赖jar -->
        <dependency>
            <groupId>com.thinkaurelius.titan</groupId>
            <artifactId>titan-core</artifactId>
            <version>1.0.0</version>
            <exclusions>
                <exclusion>
                    <artifactId>guava</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- titan——Solr-Index 依赖jar -->
        <dependency>
            <groupId>com.thinkaurelius.titan</groupId>
            <artifactId>titan-solr</artifactId>
            <version>${titan.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>guava</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- titan——Hbase-Backed 依赖jar -->
        <dependency>
            <groupId>com.thinkaurelius.titan</groupId>
            <artifactId>titan-hbase</artifactId>
            <version>${titan.version}</version>
        </dependency>
        <!-- 小鬼驱动jar -->
        <dependency>
            <groupId>org.apache.tinkerpop</groupId>
            <artifactId>gremlin-driver</artifactId>
            <version>3.0.1-incubating</version>
        </dependency>
        <!-- hbaseclient版本对应的jar -->
        <dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-client</artifactId>
            <version>1.0.0-cdh5.4.8</version>
            <exclusions>
                <exclusion>
                    <artifactId>guava</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- 指定guava的版本 -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>12.0.1</version>
        </dependency>
    </dependencies>
    <!-- Maven仓库 -->
    <repositories>
        <repository>
            <id>central</id>
            <url>http://repo1.maven.org/maven2</url>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>
        <repository>
            <id>cloudera cdh</id>
            <url>https://repository.cloudera.com/artifactory/cloudera-repos</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>apache snapshots</id>
            <url>https://repository.apache.org/content/groups/public/</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>
        <repository>
            <id>sonatypereleases</id>
            <url>https://oss.sonatype.org/content/groups/public/</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>
    </repositories>
</project>

TestTian.java

public class TestTitan {
    public static final String INDEX_NAME = "search";
    public static void main(String[] args) {
        TitanFactory.Builder config = TitanFactory.build();
        config.set("storage.backend", "hbase");
        config.set("storage.hostname", "hadoop1,hadoop2,hadoop3,hadoop4,hadoop5");
        config.set("cache.db-cache", "true");
        config.set("cache.db-cache-clean-wait", "20");
        config.set("cache.db-cache-time", "180000");
        config.set("cache.db-cache-size", "0.5");
        config.set("index.search.backend", "solr");
        config.set("index.search.solr.mode", "cloud");
        config.set("index.search.solr.zookeeper-url", "solr1:2181,solr2:2181,solr3:2181,solr4:2181,solr5:2181");
        config.set("index.search.solr.configset", "titan");
        TitanGraph graph = config.open();
        System.out.println("--------------------" + graph);
    }
}

上面就是获取Titan图实例的代码,具体如何创建顶点、边的代码,笔者还在研究。

在研究过程中遇到的问题
一、

Exception in thread "main" java.lang.NoSuchMethodError: com.google.common.base.Stopwatch.elapsedTime(Ljava/util/concurrent/TimeUnit;)J
    at com.google.common.cache.LocalCache$LoadingValueReference.elapsedNanos(LocalCache.java:3600)
    at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2412)
    at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2373)
    at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2335)
    at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2250)
    at com.google.common.cache.LocalCache.get(LocalCache.java:3985)
    at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4788)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx$6$6.call(StandardTitanTx.java:1244)
    at com.thinkaurelius.titan.graphdb.query.QueryUtil.processIntersectingRetrievals(QueryUtil.java:268)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx$6.execute(StandardTitanTx.java:1258)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx$6.execute(StandardTitanTx.java:1126)
    at com.thinkaurelius.titan.graphdb.query.QueryProcessor$LimitAdjustingIterator.getNewIterator(QueryProcessor.java:198)
    at com.thinkaurelius.titan.graphdb.query.LimitAdjustingIterator.hasNext(LimitAdjustingIterator.java:54)
    at com.thinkaurelius.titan.graphdb.query.ResultSetIterator.nextInternal(ResultSetIterator.java:40)
    at com.thinkaurelius.titan.graphdb.query.ResultSetIterator.<init>(ResultSetIterator.java:30)
    at com.thinkaurelius.titan.graphdb.query.QueryProcessor.iterator(QueryProcessor.java:57)
    at com.google.common.collect.Iterables$7.iterator(Iterables.java:613)
    at com.google.common.collect.Iterables.isEmpty(Iterables.java:1054)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.addProperty(StandardTitanTx.java:779)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.addProperty(StandardTitanTx.java:706)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.makeSchemaVertex(StandardTitanTx.java:836)
    at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.makePropertyKey(StandardTitanTx.java:856)
    at com.thinkaurelius.titan.graphdb.types.StandardPropertyKeyMaker.make(StandardPropertyKeyMaker.java:86)
    at com.run.tatin.tatindemo.TestTitan.load(TestTitan.java:50)
    at com.run.tatin.tatindemo.TestTitan.load(TestTitan.java:43)
    at com.run.tatin.tatindemo.TestTitan.main(TestTitan.java:35)

如发生上面异常是因为titan-hbase-1.0.0.jar中将guava的StopWatch类重新进行了改造并且缺少了elapsedTime这个方法,但是又因为guava12.0.1本身StopWatch类中又缺少titan-hbase包中的一些成员方法.最终解决方案是将titan-hbase-core重新修改并且打包打包后的jar在请到下面下载

http://download.csdn.net/detail/q2365921/9750637