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First commit for cassandra-indexing-triggers.

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boneill42 committed Mar 8, 2012
0 parents commit fc4535c1b4f4bc1c8b303382100f1f41d09f2dbe
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+THIRD-PARTY DEPENDENCIES
+========================
+Convenience copies of some third-party dependencies are distributed with
+Apache Cassandra as Java jar files in lib/. Licensing information for
+these files can be found in the lib/licenses directory.
@@ -0,0 +1 @@
+This is a cassandra-triggers implementation that pushes data from Cassandra into SOLR for indexing.
69 pom.xml
@@ -0,0 +1,69 @@
+<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/maven-v4_0_0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+ <packaging>jar</packaging>
+ <name> HMS : Cassandra : Triggers : Indexing</name>
+ <description>Cassandra Trigger for indexing a column family to SOLR.</description>
+ <url>https://github.com/hmsonline/cassandra-indexing-triggers</url>
+ <groupId>com.hmsonline</groupId>
+ <artifactId>hms-cassandra-indexing-trigger</artifactId>
+ <version>0.13.4-SNAPSHOT</version>
+
+ <parent>
+ <groupId>org.sonatype.oss</groupId>
+ <artifactId>oss-parent</artifactId>
+ <version>7</version>
+ </parent>
+
+ <licenses>
+ <license>
+ <name>The Apache Software License, Version 2.0</name>
+ <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+ <distribution>repo</distribution>
+ </license>
+ </licenses>
+
+ <scm>
+ <connection>scm:git:git@github.com:hmsonline/cassandra-indexing-trigger.git</connection>
+ <developerConnection>scm:git:git@github.com:hmsonline/cassandra-indexing-trigger.git</developerConnection>
+ <url>git@github.com:hmsonline/cassandra-indexing-triggers.git</url>
+ </scm>
+
+ <developers>
+ <developer>
+ <id>boneill42</id>
+ <name>Brian O'Neill</name>
+ <email>bone@alumni.brown.edu</email>
+ </developer>
+ </developers>
+
+ <dependencies>
+ <dependency>
+ <groupId>com.hmsonline</groupId>
+ <artifactId>hms-cassandra-triggers</artifactId>
+ <version>0.14.5</version>
+ </dependency>
+ </dependencies>
+
+ <build>
+ <plugins>
+ <plugin>
+ <artifactId>maven-compiler-plugin</artifactId>
+ <configuration>
+ <source>1.5</source>
+ <target>1.5</target>
+ </configuration>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-source-plugin</artifactId>
+ <version>2.1.2</version>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-javadoc-plugin</artifactId>
+ <version>2.8.1</version>
+ </plugin>
+ </plugins>
+ </build>
+</project>
@@ -0,0 +1,101 @@
+package com.hmsonline.cassandra.triggers.index;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+
+import org.apache.cassandra.thrift.Cassandra;
+import org.apache.cassandra.thrift.CassandraServer;
+import org.apache.cassandra.thrift.Column;
+import org.apache.cassandra.thrift.ColumnOrSuperColumn;
+import org.apache.cassandra.thrift.ColumnParent;
+import org.apache.cassandra.thrift.ConsistencyLevel;
+import org.apache.cassandra.thrift.SlicePredicate;
+import org.apache.cassandra.thrift.SliceRange;
+import org.apache.cassandra.utils.ByteBufferUtil;
+import org.aspectj.lang.annotation.Aspect;
+import org.json.simple.JSONObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.hmsonline.cassandra.triggers.ColumnOperation;
+import com.hmsonline.cassandra.triggers.LogEntry;
+import com.hmsonline.cassandra.triggers.Trigger;
+
+@Aspect
+public class IndexTrigger implements Trigger {
+
+ private static Logger logger = LoggerFactory.getLogger(IndexTrigger.class);
+
+ private Indexer indexer = null;
+
+ public synchronized Indexer getIndexer(String solrUrl) {
+ if (indexer == null) {
+ indexer = new SolrIndexer(solrUrl);
+ }
+ return indexer;
+ }
+
+ public Cassandra.Iface getConnection(String keyspace) throws Exception {
+ CassandraServer server = new CassandraServer();
+ if (keyspace != null) {
+ server.set_keyspace(keyspace);
+ }
+ return server;
+ }
+
+ public void process(LogEntry logEntry) {
+ String columnFamily = logEntry.getColumnFamily();
+ try {
+ String rowKey = ByteBufferUtil.string(logEntry.getRowKey());// logEntry.getUuid();
+
+ indexer = getIndexer(System.getProperty("solrHost"));
+ logger.debug("solr enabled: " + indexer.toString());
+ if (isMarkedForDelete(logEntry)) {

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mpattanaik7 Oct 13, 2012

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@mpattanaik7

mpattanaik7 Oct 13, 2012

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+ indexer.delete(columnFamily, rowKey);
+ } else {
+ JSONObject json = this.getSlice(logEntry.getKeyspace(), logEntry.getColumnFamily(),
+ logEntry.getRowKey(), logEntry.getConsistencyLevel());
+ indexer.index(logEntry.getColumnFamily(), ByteBufferUtil.string(logEntry.getRowKey()), json);
+ }
+ } catch (Exception ex) {
+ throw new RuntimeException("Unable to update index", ex);
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ public JSONObject getSlice(String keyspace, String columnFamily, ByteBuffer key, ConsistencyLevel consistencyLevel)
+ throws Exception {
+ JSONObject json = null;
+
+ SlicePredicate predicate = new SlicePredicate();
+ SliceRange range = new SliceRange(ByteBufferUtil.bytes(""), ByteBufferUtil.bytes(""), false, 1000);
+ predicate.setSlice_range(range);
+ ColumnParent parent = new ColumnParent(columnFamily);
+ List<ColumnOrSuperColumn> slice = this.getConnection(keyspace).get_slice(key, parent, predicate,
+ consistencyLevel);
+
+ if (slice.size() > 0) {
+ json = new JSONObject();
+ for (ColumnOrSuperColumn column : slice) {
+ Column col = column.getColumn();
+ json.put(new String(col.getName(), "UTF8"), new String(col.getValue(), "UTF8"));
+ }
+ }
+ return json;
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+ private boolean isMarkedForDelete(LogEntry logEntry) {
+ boolean isDeletedEntry = false;
+ for (ColumnOperation operation : logEntry.getOperations()) {
+ if (operation.isDelete()) {
+ isDeletedEntry = true;
+ break;
+ }
+ }
+ return isDeletedEntry;
+ }
+
+}
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