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| <div class="subTitle">org.apache.hadoop.fs.statistics</div> |
| <h2 title="Class IOStatisticsLogging" class="title">Class IOStatisticsLogging</h2> |
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| <ul class="inheritance"> |
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| <ul class="inheritance"> |
| <li>org.apache.hadoop.fs.statistics.IOStatisticsLogging</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public final class <span class="typeNameLabel">IOStatisticsLogging</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">Utility operations convert IO Statistics sources/instances |
| to strings, especially for robustly logging.</div> |
| </li> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsLogging.html#demandStringifyIOStatistics-org.apache.hadoop.fs.statistics.IOStatistics-">demandStringifyIOStatistics</a></span>(<a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</code> |
| <div class="block">On demand stringifier of an IOStatistics instance.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsLogging.html#demandStringifyIOStatisticsSource-org.apache.hadoop.fs.statistics.IOStatisticsSource-">demandStringifyIOStatisticsSource</a></span>(<a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsSource.html" title="interface in org.apache.hadoop.fs.statistics">IOStatisticsSource</a> source)</code> |
| <div class="block">On demand stringifier of an IOStatisticsSource instance.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <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/fs/statistics/IOStatisticsLogging.html#ioStatisticsSourceToString-java.lang.Object-">ioStatisticsSourceToString</a></span>(<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> source)</code> |
| <div class="block">Extract the statistics from a source object -or "" |
| if it is not an instance of <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics"><code>IOStatistics</code></a>, |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsSource.html" title="interface in org.apache.hadoop.fs.statistics"><code>IOStatisticsSource</code></a> or the retrieved |
| statistics are null.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <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/fs/statistics/IOStatisticsLogging.html#ioStatisticsToPrettyString-org.apache.hadoop.fs.statistics.IOStatistics-">ioStatisticsToPrettyString</a></span>(<a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</code> |
| <div class="block">Convert IOStatistics to a string form, with all the metrics sorted |
| and empty value stripped.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <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/fs/statistics/IOStatisticsLogging.html#ioStatisticsToString-org.apache.hadoop.fs.statistics.IOStatistics-">ioStatisticsToString</a></span>(<a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</code> |
| <div class="block">Convert IOStatistics to a string form.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsLogging.html#logIOStatisticsAtDebug-org.slf4j.Logger-java.lang.String-java.lang.Object-">logIOStatisticsAtDebug</a></span>(org.slf4j.Logger log, |
| <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> message, |
| <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> source)</code> |
| <div class="block">Extract any statistics from the source and log at debug, if |
| the log is set to log at debug.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsLogging.html#logIOStatisticsAtDebug-java.lang.String-java.lang.Object-">logIOStatisticsAtDebug</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> message, |
| <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> source)</code> |
| <div class="block">Extract any statistics from the source and log to |
| this class's log at debug, if |
| the log is set to log at debug.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
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| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="ioStatisticsSourceToString-java.lang.Object-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ioStatisticsSourceToString</h4> |
| <pre>public 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> ioStatisticsSourceToString(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <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> source)</pre> |
| <div class="block">Extract the statistics from a source object -or "" |
| if it is not an instance of <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics"><code>IOStatistics</code></a>, |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsSource.html" title="interface in org.apache.hadoop.fs.statistics"><code>IOStatisticsSource</code></a> or the retrieved |
| statistics are null. |
| <p> |
| Exceptions are caught and downgraded to debug logging.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>source</code> - source of statistics.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a string for logging.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="ioStatisticsToString-org.apache.hadoop.fs.statistics.IOStatistics-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ioStatisticsToString</h4> |
| <pre>public 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> ioStatisticsToString(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</pre> |
| <div class="block">Convert IOStatistics to a string form.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>statistics</code> - A statistics instance.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>string value or the empty string if null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="ioStatisticsToPrettyString-org.apache.hadoop.fs.statistics.IOStatistics-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>ioStatisticsToPrettyString</h4> |
| <pre>public 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> ioStatisticsToPrettyString(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</pre> |
| <div class="block">Convert IOStatistics to a string form, with all the metrics sorted |
| and empty value stripped. |
| This is more expensive than the simple conversion, so should only |
| be used for logging/output where it's known/highly likely that the |
| caller wants to see the values. Not for debug logging.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>statistics</code> - A statistics instance.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>string value or the empty string if null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="demandStringifyIOStatisticsSource-org.apache.hadoop.fs.statistics.IOStatisticsSource-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>demandStringifyIOStatisticsSource</h4> |
| <pre>public static <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> demandStringifyIOStatisticsSource(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatisticsSource.html" title="interface in org.apache.hadoop.fs.statistics">IOStatisticsSource</a> source)</pre> |
| <div class="block">On demand stringifier of an IOStatisticsSource instance. |
| <p> |
| Whenever this object's toString() method is called, it evaluates the |
| statistics. |
| <p> |
| This is designed to affordable to use in log statements.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>source</code> - source of statistics -may be null.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an object whose toString() operation returns the current values.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="demandStringifyIOStatistics-org.apache.hadoop.fs.statistics.IOStatistics-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>demandStringifyIOStatistics</h4> |
| <pre>public static <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> demandStringifyIOStatistics(<a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a> |
| <a href="../../../../../org/apache/hadoop/fs/statistics/IOStatistics.html" title="interface in org.apache.hadoop.fs.statistics">IOStatistics</a> statistics)</pre> |
| <div class="block">On demand stringifier of an IOStatistics instance. |
| <p> |
| Whenever this object's toString() method is called, it evaluates the |
| statistics. |
| <p> |
| This is for use in log statements where for the cost of creation |
| of this entry is low; it is affordable to use in log statements.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>statistics</code> - statistics to stringify -may be null.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an object whose toString() operation returns the current values.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="logIOStatisticsAtDebug-org.slf4j.Logger-java.lang.String-java.lang.Object-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>logIOStatisticsAtDebug</h4> |
| <pre>public static void logIOStatisticsAtDebug(org.slf4j.Logger log, |
| <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> message, |
| <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> source)</pre> |
| <div class="block">Extract any statistics from the source and log at debug, if |
| the log is set to log at debug. |
| No-op if logging is not at debug or the source is null/of |
| the wrong type/doesn't provide statistics.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>log</code> - log to log to</dd> |
| <dd><code>message</code> - message for log -this must contain "{}" for the |
| statistics report to actually get logged.</dd> |
| <dd><code>source</code> - source object</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="logIOStatisticsAtDebug-java.lang.String-java.lang.Object-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>logIOStatisticsAtDebug</h4> |
| <pre>public static void logIOStatisticsAtDebug(<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> message, |
| <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> source)</pre> |
| <div class="block">Extract any statistics from the source and log to |
| this class's log at debug, if |
| the log is set to log at debug. |
| No-op if logging is not at debug or the source is null/of |
| the wrong type/doesn't provide statistics.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>message</code> - message for log -this must contain "{}" for the |
| statistics report to actually get logged.</dd> |
| <dd><code>source</code> - source object</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
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