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| <h2 title="Class ToolRunner" class="title">Class ToolRunner</h2> |
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| <li>org.apache.hadoop.util.ToolRunner</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class <span class="typeNameLabel">ToolRunner</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">A utility to help run <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util"><code>Tool</code></a>s. |
| |
| <p><code>ToolRunner</code> can be used to run classes implementing |
| <code>Tool</code> interface. It works in conjunction with |
| <code>GenericOptionsParser</code> to parse the |
| <a href="../../../../../hadoop-project-dist/hadoop-common/CommandsManual.html#Generic_Options"> |
| generic hadoop command line arguments</a> and modifies the |
| <code>Configuration</code> of the <code>Tool</code>. The |
| application-specific options are passed along without being modified. |
| </p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util"><code>Tool</code></a>, |
| <code>GenericOptionsParser</code></dd> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/util/ToolRunner.html#ToolRunner--">ToolRunner</a></span>()</code> </td> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/util/ToolRunner.html#confirmPrompt-java.lang.String-">confirmPrompt</a></span>(<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> prompt)</code> |
| <div class="block">Print out a prompt to the user, and return true if the user |
| responds with "y" or "yes".</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/util/ToolRunner.html#printGenericCommandUsage-java.io.PrintStream-">printGenericCommandUsage</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a> out)</code> |
| <div class="block">Prints generic command-line argurments and usage information.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/util/ToolRunner.html#run-org.apache.hadoop.conf.Configuration-org.apache.hadoop.util.Tool-java.lang.String:A-">run</a></span>(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf, |
| <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a> tool, |
| <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>[] args)</code> |
| <div class="block">Runs the given <code>Tool</code> by <a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-"><code>Tool.run(String[])</code></a>, after |
| parsing with the given generic arguments.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/util/ToolRunner.html#run-org.apache.hadoop.util.Tool-java.lang.String:A-">run</a></span>(<a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a> tool, |
| <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>[] args)</code> |
| <div class="block">Runs the <code>Tool</code> with its <code>Configuration</code>.</div> |
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| <h4>ToolRunner</h4> |
| <pre>public ToolRunner()</pre> |
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| <h4>run</h4> |
| <pre>public static int run(<a href="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a> conf, |
| <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a> tool, |
| <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>[] args) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre> |
| <div class="block">Runs the given <code>Tool</code> by <a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-"><code>Tool.run(String[])</code></a>, after |
| parsing with the given generic arguments. Uses the given |
| <code>Configuration</code>, or builds one if null. |
| |
| Sets the <code>Tool</code>'s configuration with the possibly modified |
| version of the <code>conf</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - <code>Configuration</code> for the <code>Tool</code>.</dd> |
| <dd><code>tool</code> - <code>Tool</code> to run.</dd> |
| <dd><code>args</code> - command-line arguments to the tool.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>exit code of the <a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-"><code>Tool.run(String[])</code></a> method.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd> |
| </dl> |
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| <h4>run</h4> |
| <pre>public static int run(<a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a> tool, |
| <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>[] args) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre> |
| <div class="block">Runs the <code>Tool</code> with its <code>Configuration</code>. |
| |
| Equivalent to <code>run(tool.getConf(), tool, args)</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>tool</code> - <code>Tool</code> to run.</dd> |
| <dd><code>args</code> - command-line arguments to the tool.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>exit code of the <a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-"><code>Tool.run(String[])</code></a> method.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd> |
| </dl> |
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| <h4>printGenericCommandUsage</h4> |
| <pre>public static void printGenericCommandUsage(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a> out)</pre> |
| <div class="block">Prints generic command-line argurments and usage information.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>out</code> - stream to write usage information to.</dd> |
| </dl> |
| </li> |
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| <h4>confirmPrompt</h4> |
| <pre>public static boolean confirmPrompt(<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> prompt) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Print out a prompt to the user, and return true if the user |
| responds with "y" or "yes". (case insensitive)</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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