cassandra-server

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>CqlStorage (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">  </a> <ul class="navList" title="Navigation"> <li><a href="../../../../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/CqlStorage.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> <li><a 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<div class="description"> <ul class="blockList"> <li class="blockList"> <dl> <dt>All Implemented Interfaces:</dt> <dd>org.apache.pig.LoadMetadata, org.apache.pig.StoreFuncInterface</dd> </dl> <dl> <dt>Direct Known Subclasses:</dt> <dd><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlNativeStorage.html" title="class in org.apache.cassandra.hadoop.pig">CqlNativeStorage</a></dd> </dl> <hr> <br> <pre>public class <span class="strong">CqlStorage</span> extends <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html" title="class in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage</a></pre> <div class="block">A LoadStoreFunc for retrieving data from and storing data to Cassandra A row from a standard CF will be returned as nested tuples: (((key1, value1), (key2, value2)), ((name1, val1), (name2, val2))).</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="nested_class_summary">  </a> <h3>Nested Class Summary</h3> <ul class="blockList"> <li class="blockList"><a name="nested_classes_inherited_from_class_org.apache.cassandra.hadoop.pig.AbstractCassandraStorage">  </a> <h3>Nested classes/interfaces inherited from class org.apache.cassandra.hadoop.pig.<a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html" title="class in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage</a></h3> <code><a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.CfInfo.html" title="class in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage.CfInfo</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.MarshallerType.html" title="enum in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage.MarshallerType</a></code></li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="field_summary">  </a> <h3>Field Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> <caption><span>Fields</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Field and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>protected java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#columns">columns</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#outputQuery">outputQuery</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected int</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#pageSize">pageSize</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#whereClause">whereClause</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected org.apache.hadoop.mapreduce.RecordWriter<java.util.Map<java.lang.String,java.nio.ByteBuffer>,java.util.List<java.nio.ByteBuffer>></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#writer">writer</a></strong></code> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="fields_inherited_from_class_org.apache.cassandra.hadoop.pig.AbstractCassandraStorage">  </a> <h3>Fields inherited from class org.apache.cassandra.hadoop.pig.<a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html" title="class in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage</a></h3> <code><a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#column_family">column_family</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#conf">conf</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#DEFAULT_INPUT_FORMAT">DEFAULT_INPUT_FORMAT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#DEFAULT_OUTPUT_FORMAT">DEFAULT_OUTPUT_FORMAT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#initHostAddress">initHostAddress</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#inputFormatClass">inputFormatClass</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#keyspace">keyspace</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#loadSignature">loadSignature</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#outputFormatClass">outputFormatClass</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PARTITION_FILTER_SIGNATURE">PARTITION_FILTER_SIGNATURE</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#partitionerClass">partitionerClass</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#password">password</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INITIAL_ADDRESS">PIG_INITIAL_ADDRESS</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INPUT_FORMAT">PIG_INPUT_FORMAT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INPUT_INITIAL_ADDRESS">PIG_INPUT_INITIAL_ADDRESS</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INPUT_PARTITIONER">PIG_INPUT_PARTITIONER</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INPUT_RPC_PORT">PIG_INPUT_RPC_PORT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_INPUT_SPLIT_SIZE">PIG_INPUT_SPLIT_SIZE</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_OUTPUT_FORMAT">PIG_OUTPUT_FORMAT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_OUTPUT_INITIAL_ADDRESS">PIG_OUTPUT_INITIAL_ADDRESS</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_OUTPUT_PARTITIONER">PIG_OUTPUT_PARTITIONER</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_OUTPUT_RPC_PORT">PIG_OUTPUT_RPC_PORT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_PARTITIONER">PIG_PARTITIONER</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#PIG_RPC_PORT">PIG_RPC_PORT</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#rpcPort">rpcPort</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#splitSize">splitSize</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#storeSignature">storeSignature</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#usePartitionFilter">usePartitionFilter</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#username">username</a></code></li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_summary">  </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd"> </span></caption> <tr> <th class="colOne" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colOne"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#CqlStorage()">CqlStorage</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colOne"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#CqlStorage(int)">CqlStorage</a></strong>(int pageSize)</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>protected java.lang.Object</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#cqlColumnToObj(org.apache.cassandra.db.Cell,%20org.apache.cassandra.thrift.CfDef)">cqlColumnToObj</a></strong>(<a href="../../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a> col, <a href="../../../../../org/apache/cassandra/thrift/CfDef.html" title="class in org.apache.cassandra.thrift">CfDef</a> cfDef)</code> <div class="block">convert a cql column to an object</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected java.util.List<<a href="../../../../../org/apache/cassandra/thrift/ColumnDef.html" title="class in org.apache.cassandra.thrift">ColumnDef</a>></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#getColumnMetadata(org.apache.cassandra.thrift.Cassandra.Client)">getColumnMetadata</a></strong>(<a href="../../../../../org/apache/cassandra/thrift/Cassandra.Client.html" title="class in org.apache.cassandra.thrift">Cassandra.Client</a> client)</code> <div class="block">include key columns</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected java.util.List<<a href="../../../../../org/apache/cassandra/thrift/ColumnDef.html" title="class in org.apache.cassandra.thrift">ColumnDef</a>></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#getKeysMeta(org.apache.cassandra.thrift.Cassandra.Client)">getKeysMeta</a></strong>(<a href="../../../../../org/apache/cassandra/thrift/Cassandra.Client.html" title="class in org.apache.cassandra.thrift">Cassandra.Client</a> client)</code> <div class="block">get keys meta data</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>org.apache.pig.data.Tuple</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#getNext()">getNext</a></strong>()</code> <div class="block">get next row</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>org.apache.pig.ResourceSchema</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#getSchema(java.lang.String,%20org.apache.hadoop.mapreduce.Job)">getSchema</a></strong>(java.lang.String location, org.apache.hadoop.mapreduce.Job job)</code> <div class="block">schema: (value, value, value) where keys are in the front.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>java.nio.ByteBuffer</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#nullToBB()">nullToBB</a></strong>()</code> <div class="block">Thrift API can't handle null, so use empty byte array</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#prepareToRead(org.apache.hadoop.mapreduce.RecordReader,%20org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit)">prepareToRead</a></strong>(org.apache.hadoop.mapreduce.RecordReader reader, org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit split)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#prepareToWrite(org.apache.hadoop.mapreduce.RecordWriter)">prepareToWrite</a></strong>(org.apache.hadoop.mapreduce.RecordWriter writer)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#putNext(org.apache.pig.data.Tuple)">putNext</a></strong>(org.apache.pig.data.Tuple t)</code> <div class="block">output: (((name, value), (name, value)), (value ...</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#setLocation(java.lang.String,%20org.apache.hadoop.mapreduce.Job)">setLocation</a></strong>(java.lang.String location, org.apache.hadoop.mapreduce.Job job)</code> <div class="block">set read configuration settings</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#setPartitionFilter(org.apache.pig.Expression)">setPartitionFilter</a></strong>(org.apache.pig.Expression partitionFilter)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#setStoreLocation(java.lang.String,%20org.apache.hadoop.mapreduce.Job)">setStoreLocation</a></strong>(java.lang.String location, org.apache.hadoop.mapreduce.Job job)</code> <div class="block">set store configuration settings</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>protected void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/hadoop/pig/CqlStorage.html#setTupleValue(org.apache.pig.data.Tuple,%20int,%20java.lang.Object,%20org.apache.cassandra.db.marshal.AbstractType)">setTupleValue</a></strong>(org.apache.pig.data.Tuple tuple, int position, java.lang.Object value, <a href="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</a><?> validator)</code> <div class="block">set the value to the position of the tuple</div> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_org.apache.cassandra.hadoop.pig.AbstractCassandraStorage">  </a> <h3>Methods inherited from class org.apache.cassandra.hadoop.pig.<a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html" title="class in org.apache.cassandra.hadoop.pig">AbstractCassandraStorage</a></h3> <code><a 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href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#columnToTuple(org.apache.cassandra.db.Cell,%20org.apache.cassandra.hadoop.pig.AbstractCassandraStorage.CfInfo,%20org.apache.cassandra.db.marshal.AbstractType)">columnToTuple</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#composeComposite(org.apache.cassandra.db.marshal.AbstractCompositeType,%20java.nio.ByteBuffer)">composeComposite</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#getCfInfo(org.apache.cassandra.thrift.Cassandra.Client)">getCfInfo</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#getCfInfo(java.lang.String)">getCfInfo</a>, <a href="../../../../../org/apache/cassandra/hadoop/pig/AbstractCassandraStorage.html#getCFMetaData(java.lang.String,%20java.lang.String,%20org.apache.cassandra.thrift.Cassandra.Client)">getCFMetaData</a>, <a 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<h4>prepareToRead</h4> <pre>public void prepareToRead(org.apache.hadoop.mapreduce.RecordReader reader, org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit split)</pre> <dl> <dt><strong>Specified by:</strong></dt> <dd><code>prepareToRead</code> in class <code>org.apache.pig.LoadFunc</code></dd> </dl> </li> </ul> <a name="getNext()">  </a> <ul class="blockList"> <li class="blockList"> <h4>getNext</h4> <pre>public org.apache.pig.data.Tuple getNext() throws java.io.IOException</pre> <div class="block">get next row</div> <dl> <dt><strong>Specified by:</strong></dt> <dd><code>getNext</code> in class <code>org.apache.pig.LoadFunc</code></dd> <dt><span class="strong">Throws:</span></dt> <dd><code>java.io.IOException</code></dd></dl> </li> </ul> <a name="setTupleValue(org.apache.pig.data.Tuple, int, java.lang.Object, org.apache.cassandra.db.marshal.AbstractType)">  </a> <ul class="blockList"> <li class="blockList"> <h4>setTupleValue</h4> 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java.io.IOException</pre> <div class="block">convert a cql column to an object</div> <dl><dt><span class="strong">Throws:</span></dt> <dd><code>java.io.IOException</code></dd></dl> </li> </ul> <a name="setLocation(java.lang.String, org.apache.hadoop.mapreduce.Job)">  </a> <ul class="blockList"> <li class="blockList"> <h4>setLocation</h4> <pre>public void setLocation(java.lang.String location, org.apache.hadoop.mapreduce.Job job) throws java.io.IOException</pre> <div class="block">set read configuration settings</div> <dl> <dt><strong>Specified by:</strong></dt> <dd><code>setLocation</code> in class <code>org.apache.pig.LoadFunc</code></dd> <dt><span class="strong">Throws:</span></dt> <dd><code>java.io.IOException</code></dd></dl> </li> </ul> <a name="setStoreLocation(java.lang.String, org.apache.hadoop.mapreduce.Job)">  </a> <ul class="blockList"> <li class="blockList"> <h4>setStoreLocation</h4> <pre>public void setStoreLocation(java.lang.String location, 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