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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.healthmgr</a></div> |
| <h2 title="Class HealthManager" class="title">Class HealthManager</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <li>org.apache.heron.healthmgr.HealthManager</li> |
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| <pre><a href="../classification/InterfaceStability.Unstable.html" title="annotation in org.apache.heron.classification">@Unstable</a> |
| <a href="../classification/InterfaceStability.Evolving.html" title="annotation in org.apache.heron.classification">@Evolving</a> |
| public class <span class="typeNameLabel">HealthManager</span> |
| extends java.lang.Object</pre> |
| <div class="block"><a href="HealthManager.html" title="class in org.apache.heron.healthmgr"><code>HealthManager</code></a> makes a topology dynamic and self-regulating. This is implemented using |
| Dhalion library. The <a href="HealthManager.html" title="class in org.apache.heron.healthmgr"><code>HealthManager</code></a> will perform the following functions to achieve its |
| goal: |
| <ul> |
| <li>loads heron configuration including health policy configuration from |
| <code>healthmgr.yaml</code> |
| <li>initializing guice injector with metrics collection module from <code>tracker</code> or |
| <code>metrics cache</code>, <code>scheduler client</code> and <code>state client</code> |
| <li>initializes health policies instances and starts policy execution using |
| <code>PoliciesExecutor</code> |
| </ul> |
| The <a href="HealthManager.html" title="class in org.apache.heron.healthmgr"><code>HealthManager</code></a> is executed as a process. It is recommended that it is started on |
| container 0, colocated with the metrics provider and the scheduler service. |
| <p> |
| Required command line options for the <a href="HealthManager.html" title="class in org.apache.heron.healthmgr"><code>HealthManager</code></a> include |
| <ul> |
| <li>cluster name: <code>-c local</code> |
| <li>role: <code> -r dev</code> |
| <li>environment: <code> -e default</code> |
| <li>topology name: <code> -n AckingTopology</code> |
| <p> |
| </ul> |
| <p> |
| Optional command line options for the <a href="HealthManager.html" title="class in org.apache.heron.healthmgr"><code>HealthManager</code></a> include |
| <ul> |
| <li>health manager mode: <code> -m local</code>, default cluster |
| <li>heron home directory: <code> -d ~/.heron</code>, required if mode is local |
| <li>config directory: <code> -p ~/.heron/conf</code>, required if mode is local |
| <li>metrics type: <code>-s f.q.class.name</code>, |
| default: <code>org.apache.heron.healthmgr.sensors.TrackerMetricsProvider</code> |
| <li>metrics source: <code>-t http://host:port</code>, default: <code>http://127.0.0.1:8888</code> |
| <li>enable verbose mode: <code> -v</code> |
| </ul></div> |
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| <td class="colFirst"><code>static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="HealthManager.HealthManagerMode.html" title="enum in org.apache.heron.healthmgr">HealthManager.HealthManagerMode</a></span></code></th> |
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| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.heron.spi.common.Config,com.google.inject.AbstractModule)">HealthManager</a></span>​(<a href="../spi/common/Config.html" title="class in org.apache.heron.spi.common">Config</a> config, |
| com.google.inject.AbstractModule baseModule)</code></th> |
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| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#initialize()">initialize</a></span>()</code></th> |
| <td class="colLast"> </td> |
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| <td class="colFirst"><code>static void</code></td> |
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| <h4>HealthManager</h4> |
| <pre>public HealthManager​(<a href="../spi/common/Config.html" title="class in org.apache.heron.spi.common">Config</a> config, |
| com.google.inject.AbstractModule baseModule)</pre> |
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| throws java.lang.Exception</pre> |
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| <h4>initialize</h4> |
| <pre class="methodSignature">public void initialize() |
| throws java.lang.ReflectiveOperationException, |
| java.io.FileNotFoundException</pre> |
| <dl> |
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| <dd><code>java.io.FileNotFoundException</code></dd> |
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