releases/0.6.2/api/java/io/gearpump/streaming/sink/DataSink.html - incubator-retired-gearpump-site - Git at Google

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 <pre>public interface <strong>DataSink</strong>
 extends java.io.Serializable</pre>
 <div class="block">interface to implement custom data sink
  where result of a DAG is typically written
  <p>
  a DataSink could be a data store like HBase or simply a console
  <p>
  an example would be like
  <pre><code>
   class ConsoleSink extends DataSink[String] {

     def open(context: TaskContext): Unit = {}

     def write(s: String): Unit = {
       Console.println(s)
     }

     def close(): Unit = {}
   }
  </code></pre>
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  subclass is required to be serializable</div>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#close()">close</a></strong>()</code>
 <div class="block">close connection to data sink
  invoked at onClose() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#open(io.gearpump.streaming.task.TaskContext)">open</a></strong>(<a href="../../../../io/gearpump/streaming/task/TaskContext.html" title="interface in io.gearpump.streaming.task">TaskContext</a>&nbsp;context)</code>
 <div class="block">open connection to data sink
  invoked at onStart() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#write(io.gearpump.Message)">write</a></strong>(io.gearpump.Message&nbsp;message)</code>
 <div class="block">write message into data sink
  invoked at onNext() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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 <pre>void&nbsp;open(<a href="../../../../io/gearpump/streaming/task/TaskContext.html" title="interface in io.gearpump.streaming.task">TaskContext</a>&nbsp;context)</pre>
 <div class="block">open connection to data sink
  invoked at onStart() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>context</code> - is the task context at runtime</dd></dl>
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 <h4>write</h4>
 <pre>void&nbsp;write(io.gearpump.Message&nbsp;message)</pre>
 <div class="block">write message into data sink
  invoked at onNext() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>message</code> - wraps data to be written out</dd></dl>
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 <h4>close</h4>
 <pre>void&nbsp;close()</pre>
 <div class="block">close connection to data sink
  invoked at onClose() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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	<h2 title="Interface DataSink" class="title">Interface DataSink</h2>
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	<pre>public interface <strong>DataSink</strong>
	extends java.io.Serializable</pre>
	<div class="block">interface to implement custom data sink
	where result of a DAG is typically written
	<p>
	a DataSink could be a data store like HBase or simply a console
	<p>
	an example would be like
	<pre><code>
	class ConsoleSink extends DataSink[String] {

	def open(context: TaskContext): Unit = {}

	def write(s: String): Unit = {
	Console.println(s)
	}

	def close(): Unit = {}
	}
	</code></pre>
	<p>
	subclass is required to be serializable</div>
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	<td class="colFirst"><code>void</code></td>
	<td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#close()">close</a></strong>()</code>
	<div class="block">close connection to data sink
	invoked at onClose() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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	<td class="colFirst"><code>void</code></td>
	<td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#open(io.gearpump.streaming.task.TaskContext)">open</a></strong>(<a href="../../../../io/gearpump/streaming/task/TaskContext.html" title="interface in io.gearpump.streaming.task">TaskContext</a> context)</code>
	<div class="block">open connection to data sink
	invoked at onStart() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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	<td class="colFirst"><code>void</code></td>
	<td class="colLast"><code><strong><a href="../../../../io/gearpump/streaming/sink/DataSink.html#write(io.gearpump.Message)">write</a></strong>(io.gearpump.Message message)</code>
	<div class="block">write message into data sink
	invoked at onNext() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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	<h4>open</h4>
	<pre>void open(<a href="../../../../io/gearpump/streaming/task/TaskContext.html" title="interface in io.gearpump.streaming.task">TaskContext</a> context)</pre>
	<div class="block">open connection to data sink
	invoked at onStart() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
	<dl><dt><span class="strong">Parameters:</span></dt><dd><code>context</code> - is the task context at runtime</dd></dl>
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	<h4>write</h4>
	<pre>void write(io.gearpump.Message message)</pre>
	<div class="block">write message into data sink
	invoked at onNext() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
	<dl><dt><span class="strong">Parameters:</span></dt><dd><code>message</code> - wraps data to be written out</dd></dl>
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	<h4>close</h4>
	<pre>void close()</pre>
	<div class="block">close connection to data sink
	invoked at onClose() method of <a href="../../../../io/gearpump/streaming/task/Task.html" title="class in io.gearpump.streaming.task"><code>Task</code></a></div>
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