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| <h2 title="Class ScriptBasedMapping" class="title">Class ScriptBasedMapping</h2> |
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| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">org.apache.hadoop.net.AbstractDNSToSwitchMapping</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">org.apache.hadoop.net.CachedDNSToSwitchMapping</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.net.ScriptBasedMapping</li> |
| </ul> |
| </li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</a>, <a href="../../../../org/apache/hadoop/net/DNSToSwitchMapping.html" title="interface in org.apache.hadoop.net">DNSToSwitchMapping</a></dd> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">ScriptBasedMapping</span> |
| extends <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">CachedDNSToSwitchMapping</a></pre> |
| <div class="block">This class implements the <a href="../../../../org/apache/hadoop/net/DNSToSwitchMapping.html" title="interface in org.apache.hadoop.net"><code>DNSToSwitchMapping</code></a> interface using a |
| script configured via the |
| <a href="../../../../org/apache/hadoop/fs/CommonConfigurationKeysPublic.html#NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY"><code>CommonConfigurationKeysPublic.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY</code></a> option. |
| <p> |
| It contains a static class <code>RawScriptBasedMapping</code> that performs |
| the work: reading the configuration parameters, executing any defined |
| script, handling errors and such like. The outer |
| class extends <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net"><code>CachedDNSToSwitchMapping</code></a> to cache the delegated |
| queries. |
| <p> |
| This DNS mapper's <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#isSingleSwitch--"><code>CachedDNSToSwitchMapping.isSingleSwitch()</code></a> predicate returns |
| true if and only if a script is defined.</div> |
| </li> |
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| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.RawScriptBasedMapping.html" title="class in org.apache.hadoop.net">ScriptBasedMapping.RawScriptBasedMapping</a></span></code> |
| <div class="block">This is the uncached script mapping that is fed into the cache managed |
| by the superclass <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net"><code>CachedDNSToSwitchMapping</code></a></div> |
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| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#NO_SCRIPT">NO_SCRIPT</a></span></code> |
| <div class="block">Text used in the <a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#toString--"><code>toString()</code></a> method if there is no string |
| "no script"</div> |
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| <h3>Fields inherited from class org.apache.hadoop.net.<a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">CachedDNSToSwitchMapping</a></h3> |
| <code><a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#rawMapping">rawMapping</a></code></li> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#ScriptBasedMapping--">ScriptBasedMapping</a></span>()</code> |
| <div class="block">Create an instance with the default configuration.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#ScriptBasedMapping-org.apache.hadoop.conf.Configuration-">ScriptBasedMapping</a></span>(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf)</code> |
| <div class="block">Create an instance from the given configuration</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#ScriptBasedMapping-org.apache.hadoop.net.DNSToSwitchMapping-">ScriptBasedMapping</a></span>(<a href="../../../../org/apache/hadoop/net/DNSToSwitchMapping.html" title="interface in org.apache.hadoop.net">DNSToSwitchMapping</a> rawMap)</code> |
| <div class="block">Create an instance from the given raw mapping</div> |
| </td> |
| </tr> |
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| </ul> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#getConf--">getConf</a></span>()</code> |
| <div class="block">Return the configuration used by this object.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></span>(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf)</code> |
| <div class="block">Set the configuration to be used by this object.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a name="methods.inherited.from.class.org.apache.hadoop.net.CachedDNSToSwitchMapping"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.hadoop.net.<a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">CachedDNSToSwitchMapping</a></h3> |
| <code><a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#getSwitchMap--">getSwitchMap</a>, <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#isSingleSwitch--">isSingleSwitch</a>, <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#reloadCachedMappings--">reloadCachedMappings</a>, <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#reloadCachedMappings-java.util.List-">reloadCachedMappings</a>, <a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#resolve-java.util.List-">resolve</a></code></li> |
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| <h3>Methods inherited from class org.apache.hadoop.net.<a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">AbstractDNSToSwitchMapping</a></h3> |
| <code><a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html#dumpTopology--">dumpTopology</a>, <a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html#isMappingSingleSwitch-org.apache.hadoop.net.DNSToSwitchMapping-">isMappingSingleSwitch</a>, <a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html#isSingleSwitchByScriptPolicy--">isSingleSwitchByScriptPolicy</a></code></li> |
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| <div class="block">Text used in the <a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#toString--"><code>toString()</code></a> method if there is no string |
| "no script"</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.net.ScriptBasedMapping.NO_SCRIPT">Constant Field Values</a></dd> |
| </dl> |
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| </ul> |
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| <h3>Constructor Detail</h3> |
| <a name="ScriptBasedMapping--"> |
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| <ul class="blockList"> |
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| <h4>ScriptBasedMapping</h4> |
| <pre>public ScriptBasedMapping()</pre> |
| <div class="block">Create an instance with the default configuration. |
| <p> |
| Calling <a href="../../../../org/apache/hadoop/net/ScriptBasedMapping.html#setConf-org.apache.hadoop.conf.Configuration-"><code>setConf(Configuration)</code></a> will trigger a |
| re-evaluation of the configuration settings and so be used to |
| set up the mapping script.</div> |
| </li> |
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| <a name="ScriptBasedMapping-org.apache.hadoop.net.DNSToSwitchMapping-"> |
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| <h4>ScriptBasedMapping</h4> |
| <pre>public ScriptBasedMapping(<a href="../../../../org/apache/hadoop/net/DNSToSwitchMapping.html" title="interface in org.apache.hadoop.net">DNSToSwitchMapping</a> rawMap)</pre> |
| <div class="block">Create an instance from the given raw mapping</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rawMap</code> - raw DNSTOSwithMapping</dd> |
| </dl> |
| </li> |
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| <a name="ScriptBasedMapping-org.apache.hadoop.conf.Configuration-"> |
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| <h4>ScriptBasedMapping</h4> |
| <pre>public ScriptBasedMapping(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf)</pre> |
| <div class="block">Create an instance from the given configuration</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - configuration</dd> |
| </dl> |
| </li> |
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| </li> |
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| <h3>Method Detail</h3> |
| <a name="getConf--"> |
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| <h4>getConf</h4> |
| <pre>public <a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> getConf()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../org/apache/hadoop/conf/Configurable.html#getConf--">Configurable</a></code></span></div> |
| <div class="block">Return the configuration used by this object.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/conf/Configurable.html#getConf--">getConf</a></code> in interface <code><a href="../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html#getConf--">getConf</a></code> in class <code><a href="../../../../org/apache/hadoop/net/AbstractDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">AbstractDNSToSwitchMapping</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Configuration</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="toString--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>toString</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html#toString--">toString</a></code> in class <code><a href="../../../../org/apache/hadoop/net/CachedDNSToSwitchMapping.html" title="class in org.apache.hadoop.net">CachedDNSToSwitchMapping</a></code></dd> |
| </dl> |
| </li> |
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| <a name="setConf-org.apache.hadoop.conf.Configuration-"> |
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| <h4>setConf</h4> |
| <pre>public void setConf(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf)</pre> |
| <div class="block">Set the configuration to be used by this object. |
| <p> |
| This will get called in the superclass constructor, so a check is needed |
| to ensure that the raw mapping is defined before trying to relaying a null |
| configuration.</div> |
| <dl> |
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