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| <div class="subTitle">org.apache.hadoop.hbase.util</div> |
| <h2 title="Class CoprocessorClassLoader" class="title">Class CoprocessorClassLoader</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <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> |
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| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/security/SecureClassLoader.html?is-external=true" title="class or interface in java.security">java.security.SecureClassLoader</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true" title="class or interface in java.net">java.net.URLClassLoader</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html" title="class in org.apache.hadoop.hbase.util">org.apache.hadoop.hbase.util.ClassLoaderBase</a></li> |
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| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.78">CoprocessorClassLoader</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html" title="class in org.apache.hadoop.hbase.util">ClassLoaderBase</a></pre> |
| <div class="block">ClassLoader used to load classes for Coprocessor instances. |
| <p> |
| This ClassLoader always tries to load classes from the specified coprocessor |
| jar first actually using URLClassLoader logic before delegating to the parent |
| ClassLoader, thus avoiding dependency conflicts between HBase's classpath and |
| classes in the coprocessor jar. |
| <p> |
| Certain classes are exempt from being loaded by this ClassLoader because it |
| would prevent them from being cast to the equivalent classes in the region |
| server. For example, the Coprocessor interface needs to be loaded by the |
| region server's ClassLoader to prevent a ClassCastException when casting the |
| coprocessor implementation. |
| <p> |
| A HDFS path can be used to specify the coprocessor jar. In this case, the jar |
| will be copied to local at first under some folder under ${hbase.local.dir}/jars/tmp/. |
| The local copy will be removed automatically when the HBase server instance is |
| stopped. |
| <p> |
| This ClassLoader also handles resource loading. In most cases this |
| ClassLoader will attempt to load resources from the coprocessor jar first |
| before delegating to the parent. However, like in class loading, |
| some resources need to be handled differently. For all of the Hadoop |
| default configurations (e.g. hbase-default.xml) we will check the parent |
| ClassLoader first to prevent issues such as failing the HBase default |
| configuration version check.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private 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/hbase/util/CoprocessorClassLoader.html#CLASS_PREFIX_EXEMPTIONS">CLASS_PREFIX_EXEMPTIONS</a></span></code> |
| <div class="block">If the class being loaded starts with any of these strings, we will skip |
| trying to load it from the coprocessor jar and instead delegate |
| directly to the parent ClassLoader.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><org.apache.hadoop.fs.Path,<a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#classLoadersCache">classLoadersCache</a></span></code> |
| <div class="block">External class loaders cache keyed by external jar path.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html?is-external=true" title="class or interface in java.util.regex">Pattern</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#libJarPattern">libJarPattern</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="../../../../../org/apache/hadoop/hbase/util/KeyLocker.html" title="class in org.apache.hadoop.hbase.util">KeyLocker</a><<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/hbase/util/CoprocessorClassLoader.html#locker">locker</a></span></code> |
| <div class="block">A locker used to synchronize class loader initialization per coprocessor jar file</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashSet.html?is-external=true" title="class or interface in java.util">HashSet</a><<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/hbase/util/CoprocessorClassLoader.html#parentDirLockSet">parentDirLockSet</a></span></code> |
| <div class="block">A set used to synchronized parent path clean up.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html?is-external=true" title="class or interface in java.util.regex">Pattern</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#RESOURCE_LOAD_PARENT_FIRST_PATTERNS">RESOURCE_LOAD_PARENT_FIRST_PATTERNS</a></span></code> |
| <div class="block">If the resource being loaded matches any of these patterns, we will first |
| attempt to load the resource with the parent ClassLoader.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private 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/hbase/util/CoprocessorClassLoader.html#TMP_JARS_DIR">TMP_JARS_DIR</a></span></code> </td> |
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| <h3>Fields inherited from class org.apache.hadoop.hbase.util.<a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html" title="class in org.apache.hadoop.hbase.util">ClassLoaderBase</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html#DEFAULT_LOCAL_DIR">DEFAULT_LOCAL_DIR</a>, <a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html#LOCAL_DIR_KEY">LOCAL_DIR_KEY</a>, <a href="../../../../../org/apache/hadoop/hbase/util/ClassLoaderBase.html#parent">parent</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
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| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colLast" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#CoprocessorClassLoader-java.lang.ClassLoader-">CoprocessorClassLoader</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a> parent)</code> |
| <div class="block">Creates a JarClassLoader that loads classes from the given paths.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <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="t2" class="tableTab"><span><a href="javascript:show(2);">Instance 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 void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#clearCache--">clearCache</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><? extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#getAllCached--">getAllCached</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#getClassLoader-org.apache.hadoop.fs.Path-java.lang.ClassLoader-java.lang.String-org.apache.hadoop.conf.Configuration-">getClassLoader</a></span>(org.apache.hadoop.fs.Path path, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a> parent, |
| <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> pathPrefix, |
| org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Get a CoprocessorClassLoader for a coprocessor jar path from cache.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#getIfCached-org.apache.hadoop.fs.Path-">getIfCached</a></span>(org.apache.hadoop.fs.Path path)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#getResource-java.lang.String-">getResource</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> name)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#init-org.apache.hadoop.fs.Path-java.lang.String-org.apache.hadoop.conf.Configuration-">init</a></span>(org.apache.hadoop.fs.Path pathPattern, |
| <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> pathPrefix, |
| org.apache.hadoop.conf.Configuration conf)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#isClassExempt-java.lang.String-java.lang.String:A-">isClassExempt</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> name, |
| <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>[] includedClassPrefixes)</code> |
| <div class="block">Determines whether the given class should be exempt from being loaded |
| by this ClassLoader.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#loadClass-java.lang.String-">loadClass</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> name)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#loadClass-java.lang.String-java.lang.String:A-">loadClass</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> name, |
| <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>[] includedClassPrefixes)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#loadResourceUsingParentFirst-java.lang.String-">loadResourceUsingParentFirst</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> name)</code> |
| <div class="block">Determines whether we should attempt to load the given resource using the |
| parent first before attempting to load the resource using this ClassLoader.</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from class java.net.<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true" title="class or interface in java.net">URLClassLoader</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#addURL-java.net.URL-" title="class or interface in java.net">addURL</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#close--" title="class or interface in java.net">close</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#definePackage-java.lang.String-java.util.jar.Manifest-java.net.URL-" title="class or interface in java.net">definePackage</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#findClass-java.lang.String-" title="class or interface in java.net">findClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#findResource-java.lang.String-" title="class or interface in java.net">findResource</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#findResources-java.lang.String-" title="class or interface in java.net">findResources</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#getPermissions-java.security.CodeSource-" title="class or interface in java.net">getPermissions</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#getResourceAsStream-java.lang.String-" title="class or interface in java.net">getResourceAsStream</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#getURLs--" title="class or interface in java.net">getURLs</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#newInstance-java.net.URL:A-" title="class or interface in java.net">newInstance</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URLClassLoader.html?is-external=true#newInstance-java.net.URL:A-java.lang.ClassLoader-" title="class or interface in java.net">newInstance</a></code></li> |
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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/security/SecureClassLoader.html?is-external=true#defineClass-java.lang.String-byte:A-int-int-java.security.CodeSource-" title="class or interface in java.security">defineClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/security/SecureClassLoader.html?is-external=true#defineClass-java.lang.String-java.nio.ByteBuffer-java.security.CodeSource-" title="class or interface in java.security">defineClass</a></code></li> |
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| <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> |
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| <pre>private static final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><org.apache.hadoop.fs.Path,<a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.92">classLoadersCache</a></pre> |
| <div class="block">External class loaders cache keyed by external jar path. |
| ClassLoader instance is stored as a weak-reference |
| to allow GC'ing when it is not used |
| (@see HBASE-7205)</div> |
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| <div class="block">If the class being loaded starts with any of these strings, we will skip |
| trying to load it from the coprocessor jar and instead delegate |
| directly to the parent ClassLoader.</div> |
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| <div class="block">If the resource being loaded matches any of these patterns, we will first |
| attempt to load the resource with the parent ClassLoader. Only if the |
| resource is not found by the parent do we attempt to load it from the coprocessor jar.</div> |
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| <pre>private static final <a href="../../../../../org/apache/hadoop/hbase/util/KeyLocker.html" title="class in org.apache.hadoop.hbase.util">KeyLocker</a><<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>> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.133">locker</a></pre> |
| <div class="block">A locker used to synchronize class loader initialization per coprocessor jar file</div> |
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| <div class="block">A set used to synchronized parent path clean up. Generally, there |
| should be only one parent path, but using a set so that we can support more.</div> |
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| <pre>private <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.144">CoprocessorClassLoader</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a> parent)</pre> |
| <div class="block">Creates a JarClassLoader that loads classes from the given paths.</div> |
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| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.148">init</a>(org.apache.hadoop.fs.Path pathPattern, |
| <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> pathPrefix, |
| org.apache.hadoop.conf.Configuration conf) |
| 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> |
| <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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| <pre>public static <a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.214">getIfCached</a>(org.apache.hadoop.fs.Path path)</pre> |
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| <pre>public static <a href="../../../../../org/apache/hadoop/hbase/util/CoprocessorClassLoader.html" title="class in org.apache.hadoop.hbase.util">CoprocessorClassLoader</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.240">getClassLoader</a>(org.apache.hadoop.fs.Path path, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a> parent, |
| <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> pathPrefix, |
| org.apache.hadoop.conf.Configuration conf) |
| 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">Get a CoprocessorClassLoader for a coprocessor jar path from cache. |
| If not in cache, create one.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>path</code> - the path to the coprocessor jar file to load classes from</dd> |
| <dd><code>parent</code> - the parent class loader for exempted classes</dd> |
| <dd><code>pathPrefix</code> - a prefix used in temp path name to store the jar file locally</dd> |
| <dd><code>conf</code> - the configuration used to create the class loader, if needed</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a CoprocessorClassLoader for the coprocessor jar path</dd> |
| <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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| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true#loadClass-java.lang.String-" title="class or interface in java.lang">loadClass</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code></dd> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.292">loadClass</a>(<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> name, |
| <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>[] includedClassPrefixes) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code></dd> |
| </dl> |
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| </ul> |
| <a name="getResource-java.lang.String-"> |
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| <h4>getResource</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.340">getResource</a>(<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> name)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true#getResource-java.lang.String-" title="class or interface in java.lang">getResource</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ClassLoader.html?is-external=true" title="class or interface in java.lang">ClassLoader</a></code></dd> |
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| <h4>isClassExempt</h4> |
| <pre>protected boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.374">isClassExempt</a>(<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> name, |
| <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>[] includedClassPrefixes)</pre> |
| <div class="block">Determines whether the given class should be exempt from being loaded |
| by this ClassLoader.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - the name of the class to test.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the class should *not* be loaded by this ClassLoader; |
| false otherwise.</dd> |
| </dl> |
| </li> |
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| <h4>loadResourceUsingParentFirst</h4> |
| <pre>protected boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/util/CoprocessorClassLoader.html#line.398">loadResourceUsingParentFirst</a>(<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> name)</pre> |
| <div class="block">Determines whether we should attempt to load the given resource using the |
| parent first before attempting to load the resource using this ClassLoader.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - the name of the resource to test.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if we should attempt to load the resource using the parent |
| first; false if we should attempt to load the resource using this |
| ClassLoader first.</dd> |
| </dl> |
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