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| <div class="subTitle">org.apache.beam.sdk.io.cdap</div> |
| <h2 title="Class CdapIO" class="title">Class CdapIO</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <ul class="inheritance"> |
| <li>org.apache.beam.sdk.io.cdap.CdapIO</li> |
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| <pre><a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.html" title="annotation in org.apache.beam.sdk.annotations">@Experimental</a>(<a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.html#value--">value</a>=<a href="../../../../../../org/apache/beam/sdk/annotations/Experimental.Kind.html#SOURCE_SINK">SOURCE_SINK</a>) |
| public class <span class="typeNameLabel">CdapIO</span> |
| extends java.lang.Object</pre> |
| <div class="block">A <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html" title="class in org.apache.beam.sdk.io.cdap"><code>CdapIO</code></a> is a Transform for reading data from source or writing data to sink of a Cdap |
| Plugin. It uses <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HadoopFormatIO</code></a> for Batch and SparkReceiverIO for Streaming. |
| |
| <h2>Read from Cdap Plugin Bounded Source</h2> |
| |
| <p>To configure <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html" title="class in org.apache.beam.sdk.io.cdap"><code>CdapIO</code></a> source, you must specify Cdap <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a>, Cdap <a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/plugin/PluginConfig.html?is-external=true" title="class or interface in io.cdap.cdap.api.plugin"><code>PluginConfig</code></a>, key and value classes. |
| |
| <p><a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a> is the Wrapper class for the Cdap Plugin. It contains main information about |
| the Plugin. The object of the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a> class can be created with the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html#createBatch-java.lang.Class-java.lang.Class-java.lang.Class-"><code>Plugin.createBatch(Class, Class, Class)</code></a> method. Method requires the following parameters: |
| |
| <ul> |
| <li><a href="https://static.javadoc.io/io.cdap.cdap/cdap-etl-api/6.5.1/io/cdap/cdap/etl/api/batch/BatchSource.html?is-external=true" title="class or interface in io.cdap.cdap.etl.api.batch"><code>BatchSource</code></a> class |
| <li><a href="https://static.javadoc.io/org.apache.hadoop/hadoop-mapreduce-client-core/2.10.2/org/apache/hadoop/mapreduce/InputFormat.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>InputFormat</code></a> class |
| <li><a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/data/batch/InputFormatProvider.html?is-external=true" title="class or interface in io.cdap.cdap.api.data.batch"><code>InputFormatProvider</code></a> class |
| </ul> |
| |
| <p>For more information about the InputFormat and InputFormatProvider, see <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HadoopFormatIO</code></a>. |
| |
| <p>Every Cdap Plugin has its <a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/plugin/PluginConfig.html?is-external=true" title="class or interface in io.cdap.cdap.api.plugin"><code>PluginConfig</code></a> class with necessary fields to configure the |
| Plugin. You can set the <code>Map</code> of your parameters with the <a href="../../../../../../org/apache/beam/sdk/io/cdap/ConfigWrapper.html#withParams-java.util.Map-"><code>ConfigWrapper.withParams(Map)</code></a> method where the key is the field name. |
| |
| <p>For example, to create a basic <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#read--"><code>read()</code></a> transform: |
| |
| <pre><code> |
| Pipeline p = ...; // Create pipeline. |
| |
| // Create PluginConfig for specific plugin |
| EmployeeConfig pluginConfig = |
| new ConfigWrapper<>(EmployeeConfig.class).withParams(TEST_EMPLOYEE_PARAMS_MAP).build(); |
| |
| // Read using CDAP batch plugin |
| p.apply("ReadBatch", |
| CdapIO.<String, String>read() |
| .withCdapPlugin( |
| Plugin.createBatch( |
| EmployeeBatchSource.class, |
| EmployeeInputFormat.class, |
| EmployeeInputFormatProvider.class)) |
| .withPluginConfig(pluginConfig) |
| .withKeyClass(String.class) |
| .withValueClass(String.class)); |
| </code></pre> |
| |
| <h2>Write to Cdap Plugin Bounded Sink</h2> |
| |
| <p>To configure <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html" title="class in org.apache.beam.sdk.io.cdap"><code>CdapIO</code></a> sink, just as <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#read--"><code>read()</code></a> Cdap <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a>, Cdap |
| <a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/plugin/PluginConfig.html?is-external=true" title="class or interface in io.cdap.cdap.api.plugin"><code>PluginConfig</code></a>, key, value classes must be specified. In addition, it's necessary to |
| determine locks directory path <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html#withLocksDirPath-java.lang.String-"><code>CdapIO.Write.withLocksDirPath(String)</code></a>. It's used for |
| <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HDFSSynchronization.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HDFSSynchronization</code></a> configuration for <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HadoopFormatIO</code></a>. More info can be found in |
| <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HadoopFormatIO</code></a> documentation. |
| |
| <p>To create the object of the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a> class with the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html#createBatch-java.lang.Class-java.lang.Class-java.lang.Class-"><code>Plugin.createBatch(Class, |
| Class, Class)</code></a> method, need to specify the following parameters: |
| |
| <ul> |
| <li><a href="https://static.javadoc.io/io.cdap.cdap/cdap-etl-api/6.5.1/io/cdap/cdap/etl/api/batch/BatchSink.html?is-external=true" title="class or interface in io.cdap.cdap.etl.api.batch"><code>BatchSink</code></a> class |
| <li><a href="https://static.javadoc.io/org.apache.hadoop/hadoop-mapreduce-client-core/2.10.2/org/apache/hadoop/mapreduce/OutputFormat.html?is-external=true" title="class or interface in org.apache.hadoop.mapreduce"><code>OutputFormat</code></a> class |
| <li><a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/data/batch/OutputFormatProvider.html?is-external=true" title="class or interface in io.cdap.cdap.api.data.batch"><code>OutputFormatProvider</code></a> class |
| </ul> |
| |
| <p>For more information about the OutputFormat and OutputFormatProvider, see <a href="../../../../../../org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.html" title="class in org.apache.beam.sdk.io.hadoop.format"><code>HadoopFormatIO</code></a>. |
| |
| <p>Example of <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#write--"><code>write()</code></a> usage: |
| |
| <pre><code> |
| Pipeline p = ...; // Create pipeline. |
| |
| // Get or create data to write |
| PCollection<KV<String, String>> input = p.apply(Create.of(data)); |
| |
| // Create PluginConfig for specific plugin |
| EmployeeConfig pluginConfig = |
| new ConfigWrapper<>(EmployeeConfig.class).withParams(TEST_EMPLOYEE_PARAMS_MAP).build(); |
| |
| // Write using CDAP batch plugin |
| input.apply( |
| "WriteBatch", |
| CdapIO.<String, String>write() |
| .withCdapPlugin( |
| Plugin.createBatch( |
| EmployeeBatchSink.class, |
| EmployeeOutputFormat.class, |
| EmployeeOutputFormatProvider.class)) |
| .withPluginConfig(pluginConfig) |
| .withKeyClass(String.class) |
| .withValueClass(String.class) |
| .withLocksDirPath(tmpFolder.getRoot().getAbsolutePath())); |
| p.run(); |
| </code></pre> |
| |
| <h2>Read from Cdap Plugin Streaming Source</h2> |
| |
| <p>To configure <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html" title="class in org.apache.beam.sdk.io.cdap"><code>CdapIO</code></a> source, you must specify Cdap <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a>, Cdap <a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/plugin/PluginConfig.html?is-external=true" title="class or interface in io.cdap.cdap.api.plugin"><code>PluginConfig</code></a>, key and value classes. |
| |
| <p>Optionally you can pass <code>pullFrequencySec</code> which is a delay in seconds between polling |
| for new records updates, you can pass <code>startOffset</code> which is inclusive start offset from |
| which the reading should be started. |
| |
| <p><a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a> is the Wrapper class for the Cdap Plugin. It contains main information about |
| the Plugin. The object of the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html" title="class in org.apache.beam.sdk.io.cdap"><code>Plugin</code></a> class can be created with the <a href="../../../../../../org/apache/beam/sdk/io/cdap/Plugin.html#createStreaming-java.lang.Class-org.apache.beam.sdk.transforms.SerializableFunction-java.lang.Class-"><code>Plugin.createStreaming(Class, SerializableFunction, Class)</code></a> method. Method requires <a href="https://static.javadoc.io/io.cdap.cdap/cdap-etl-api/6.5.1/io/cdap/cdap/etl/api/streaming.StreamingSource.html?is-external=true" title="class or interface in io.cdap.cdap.etl.api"><code>StreamingSource</code></a> class, <code>getOffsetFn</code> which is a <a href="../../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms"><code>SerializableFunction</code></a> that defines how to get <code>Long offset</code> from <code>V record</code>, Spark |
| <code>Receiver</code> class parameters. |
| |
| <p>Every Cdap Plugin has its <a href="https://static.javadoc.io/io.cdap.cdap/cdap-api/6.5.1/io/cdap/cdap/api/plugin/PluginConfig.html?is-external=true" title="class or interface in io.cdap.cdap.api.plugin"><code>PluginConfig</code></a> class with necessary fields to configure the |
| Plugin. You can set the <code>Map</code> of your parameters with the <a href="../../../../../../org/apache/beam/sdk/io/cdap/ConfigWrapper.html#withParams-java.util.Map-"><code>ConfigWrapper.withParams(Map)</code></a> method where the key is the field name. |
| |
| <p>For example, to create a basic <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#read--"><code>read()</code></a> transform: |
| |
| <pre><code> |
| Pipeline p = ...; // Create pipeline. |
| |
| // Create PluginConfig for specific plugin |
| EmployeeConfig pluginConfig = |
| new ConfigWrapper<>(EmployeeConfig.class).withParams(TEST_EMPLOYEE_PARAMS_MAP).build(); |
| |
| // Read using CDAP streaming plugin |
| p.apply("ReadStreaming", |
| CdapIO.<String, String>read() |
| .withCdapPlugin( |
| Plugin.createStreaming( |
| EmployeeStreamingSource.class, |
| Long::valueOf, |
| EmployeeReceiver.class)) |
| .withPluginConfig(pluginConfig) |
| .withKeyClass(String.class) |
| .withValueClass(String.class) |
| .withPullFrequencySec(1L) |
| .withStartOffset(10L); |
| </code></pre></div> |
| </li> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Read.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Read</a><<a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Read.html" title="type parameter in CdapIO.Read">K</a>,<a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Read.html" title="type parameter in CdapIO.Read">V</a>></span></code> |
| <div class="block">A <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> to read from CDAP source.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Write</a><<a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html" title="type parameter in CdapIO.Write">K</a>,<a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html" title="type parameter in CdapIO.Write">V</a>></span></code> |
| <div class="block">A <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> to write to CDAP sink.</div> |
| </td> |
| </tr> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#CdapIO--">CdapIO</a></span>()</code> </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static <K,V> <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Read.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Read</a><K,V></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#read--">read</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <K,V> <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Write</a><K,V></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.html#write--">write</a></span>()</code> </td> |
| </tr> |
| </table> |
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| <!-- --> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
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| <h4>CdapIO</h4> |
| <pre>public CdapIO()</pre> |
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| <h4>read</h4> |
| <pre>public static <K,V> <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Read.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Read</a><K,V> read()</pre> |
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| <h4>write</h4> |
| <pre>public static <K,V> <a href="../../../../../../org/apache/beam/sdk/io/cdap/CdapIO.Write.html" title="class in org.apache.beam.sdk.io.cdap">CdapIO.Write</a><K,V> write()</pre> |
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