http://git-wip-us.apache.org/repos/asf/hbase-site/blob/5a2158f2/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.html index ed99dd8..cb1b7e5 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.html @@ -66,670 +66,669 @@ <span class="sourceLineNo">058</span> * @param <E> type of specific coprocessor environment this host requires.<a name="line.58"></a> <span class="sourceLineNo">059</span> * provides<a name="line.59"></a> <span class="sourceLineNo">060</span> */<a name="line.60"></a> -<span class="sourceLineNo">061</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)<a name="line.61"></a> -<span class="sourceLineNo">062</span>@InterfaceStability.Evolving<a name="line.62"></a> -<span class="sourceLineNo">063</span>public abstract class CoprocessorHost<C extends Coprocessor, E extends CoprocessorEnvironment<C>> {<a name="line.63"></a> -<span class="sourceLineNo">064</span> public static final String REGION_COPROCESSOR_CONF_KEY =<a name="line.64"></a> -<span class="sourceLineNo">065</span> "hbase.coprocessor.region.classes";<a name="line.65"></a> -<span class="sourceLineNo">066</span> public static final String REGIONSERVER_COPROCESSOR_CONF_KEY =<a name="line.66"></a> -<span class="sourceLineNo">067</span> "hbase.coprocessor.regionserver.classes";<a name="line.67"></a> -<span class="sourceLineNo">068</span> public static final String USER_REGION_COPROCESSOR_CONF_KEY =<a name="line.68"></a> -<span class="sourceLineNo">069</span> "hbase.coprocessor.user.region.classes";<a name="line.69"></a> -<span class="sourceLineNo">070</span> public static final String MASTER_COPROCESSOR_CONF_KEY =<a name="line.70"></a> -<span class="sourceLineNo">071</span> "hbase.coprocessor.master.classes";<a name="line.71"></a> -<span class="sourceLineNo">072</span> public static final String WAL_COPROCESSOR_CONF_KEY =<a name="line.72"></a> -<span class="sourceLineNo">073</span> "hbase.coprocessor.wal.classes";<a name="line.73"></a> -<span class="sourceLineNo">074</span> public static final String ABORT_ON_ERROR_KEY = "hbase.coprocessor.abortonerror";<a name="line.74"></a> -<span class="sourceLineNo">075</span> public static final boolean DEFAULT_ABORT_ON_ERROR = true;<a name="line.75"></a> -<span class="sourceLineNo">076</span> public static final String COPROCESSORS_ENABLED_CONF_KEY = "hbase.coprocessor.enabled";<a name="line.76"></a> -<span class="sourceLineNo">077</span> public static final boolean DEFAULT_COPROCESSORS_ENABLED = true;<a name="line.77"></a> -<span class="sourceLineNo">078</span> public static final String USER_COPROCESSORS_ENABLED_CONF_KEY =<a name="line.78"></a> -<span class="sourceLineNo">079</span> "hbase.coprocessor.user.enabled";<a name="line.79"></a> -<span class="sourceLineNo">080</span> public static final boolean DEFAULT_USER_COPROCESSORS_ENABLED = true;<a name="line.80"></a> -<span class="sourceLineNo">081</span><a name="line.81"></a> -<span class="sourceLineNo">082</span> private static final Log LOG = LogFactory.getLog(CoprocessorHost.class);<a name="line.82"></a> -<span class="sourceLineNo">083</span> protected Abortable abortable;<a name="line.83"></a> -<span class="sourceLineNo">084</span> /** Ordered set of loaded coprocessors with lock */<a name="line.84"></a> -<span class="sourceLineNo">085</span> protected final SortedList<E> coprocEnvironments =<a name="line.85"></a> -<span class="sourceLineNo">086</span> new SortedList<>(new EnvironmentPriorityComparator());<a name="line.86"></a> -<span class="sourceLineNo">087</span> protected Configuration conf;<a name="line.87"></a> -<span class="sourceLineNo">088</span> // unique file prefix to use for local copies of jars when classloading<a name="line.88"></a> -<span class="sourceLineNo">089</span> protected String pathPrefix;<a name="line.89"></a> -<span class="sourceLineNo">090</span> protected AtomicInteger loadSequence = new AtomicInteger();<a name="line.90"></a> -<span class="sourceLineNo">091</span><a name="line.91"></a> -<span class="sourceLineNo">092</span> public CoprocessorHost(Abortable abortable) {<a name="line.92"></a> -<span class="sourceLineNo">093</span> this.abortable = abortable;<a name="line.93"></a> -<span class="sourceLineNo">094</span> this.pathPrefix = UUID.randomUUID().toString();<a name="line.94"></a> -<span class="sourceLineNo">095</span> }<a name="line.95"></a> -<span class="sourceLineNo">096</span><a name="line.96"></a> -<span class="sourceLineNo">097</span> /**<a name="line.97"></a> -<span class="sourceLineNo">098</span> * Not to be confused with the per-object _coprocessors_ (above),<a name="line.98"></a> -<span class="sourceLineNo">099</span> * coprocessorNames is static and stores the set of all coprocessors ever<a name="line.99"></a> -<span class="sourceLineNo">100</span> * loaded by any thread in this JVM. 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Read the class names from configuration.<a name="line.130"></a> -<span class="sourceLineNo">131</span> * Called by constructor.<a name="line.131"></a> -<span class="sourceLineNo">132</span> */<a name="line.132"></a> -<span class="sourceLineNo">133</span> protected void loadSystemCoprocessors(Configuration conf, String confKey) {<a name="line.133"></a> -<span class="sourceLineNo">134</span> boolean coprocessorsEnabled = conf.getBoolean(COPROCESSORS_ENABLED_CONF_KEY,<a name="line.134"></a> -<span class="sourceLineNo">135</span> DEFAULT_COPROCESSORS_ENABLED);<a name="line.135"></a> -<span class="sourceLineNo">136</span> if (!coprocessorsEnabled) {<a name="line.136"></a> -<span class="sourceLineNo">137</span> return;<a name="line.137"></a> -<span class="sourceLineNo">138</span> }<a name="line.138"></a> -<span class="sourceLineNo">139</span><a name="line.139"></a> -<span class="sourceLineNo">140</span> Class<?> implClass;<a name="line.140"></a> -<span class="sourceLineNo">141</span><a name="line.141"></a> -<span class="sourceLineNo">142</span> // load default coprocessors from configure file<a name="line.142"></a> -<span class="sourceLineNo">143</span> String[] defaultCPClasses = conf.getStrings(confKey);<a name="line.143"></a> -<span class="sourceLineNo">144</span> if (defaultCPClasses == null || defaultCPClasses.length == 0)<a name="line.144"></a> -<span class="sourceLineNo">145</span> return;<a name="line.145"></a> -<span class="sourceLineNo">146</span><a name="line.146"></a> -<span class="sourceLineNo">147</span> int priority = Coprocessor.PRIORITY_SYSTEM;<a name="line.147"></a> -<span class="sourceLineNo">148</span> for (String className : defaultCPClasses) {<a name="line.148"></a> -<span class="sourceLineNo">149</span> className = className.trim();<a name="line.149"></a> -<span class="sourceLineNo">150</span> if (findCoprocessor(className) != null) {<a name="line.150"></a> -<span class="sourceLineNo">151</span> // If already loaded will just continue<a 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priority, conf);<a name="line.161"></a> -<span class="sourceLineNo">162</span> if (env != null) {<a name="line.162"></a> -<span class="sourceLineNo">163</span> this.coprocEnvironments.add(env);<a name="line.163"></a> -<span class="sourceLineNo">164</span> LOG.info(<a name="line.164"></a> -<span class="sourceLineNo">165</span> "System coprocessor " + className + " was loaded " + "successfully with priority (" + priority + ").");<a name="line.165"></a> -<span class="sourceLineNo">166</span> ++priority;<a name="line.166"></a> -<span class="sourceLineNo">167</span> }<a name="line.167"></a> -<span class="sourceLineNo">168</span> } catch (Throwable t) {<a name="line.168"></a> -<span class="sourceLineNo">169</span> // We always abort if system coprocessors cannot be loaded<a name="line.169"></a> -<span class="sourceLineNo">170</span> abortServer(className, t);<a name="line.170"></a> -<span class="sourceLineNo">171</span> }<a name="line.171"></a> -<span class="sourceLineNo">172</span> }<a 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includedClassPrefixes) throws IOException {<a name="line.203"></a> -<span class="sourceLineNo">204</span> Class<?> implClass;<a name="line.204"></a> -<span class="sourceLineNo">205</span> LOG.debug("Loading coprocessor class " + className + " with path " +<a name="line.205"></a> -<span class="sourceLineNo">206</span> path + " and priority " + priority);<a name="line.206"></a> -<span class="sourceLineNo">207</span><a name="line.207"></a> -<span class="sourceLineNo">208</span> ClassLoader cl = null;<a name="line.208"></a> -<span class="sourceLineNo">209</span> if (path == null) {<a name="line.209"></a> -<span class="sourceLineNo">210</span> try {<a name="line.210"></a> -<span class="sourceLineNo">211</span> implClass = getClass().getClassLoader().loadClass(className);<a name="line.211"></a> -<span class="sourceLineNo">212</span> } catch (ClassNotFoundException e) {<a name="line.212"></a> -<span class="sourceLineNo">213</span> throw new IOException("No jar path specified for " + 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class="sourceLineNo">224</span><a name="line.224"></a> -<span class="sourceLineNo">225</span> //load custom code for coprocessor<a name="line.225"></a> -<span class="sourceLineNo">226</span> Thread currentThread = Thread.currentThread();<a name="line.226"></a> -<span class="sourceLineNo">227</span> ClassLoader hostClassLoader = currentThread.getContextClassLoader();<a name="line.227"></a> -<span class="sourceLineNo">228</span> try{<a name="line.228"></a> -<span class="sourceLineNo">229</span> // switch temporarily to the thread classloader for custom CP<a name="line.229"></a> -<span class="sourceLineNo">230</span> currentThread.setContextClassLoader(cl);<a name="line.230"></a> -<span class="sourceLineNo">231</span> E cpInstance = checkAndLoadInstance(implClass, priority, conf);<a name="line.231"></a> -<span class="sourceLineNo">232</span> return cpInstance;<a name="line.232"></a> -<span class="sourceLineNo">233</span> } finally {<a name="line.233"></a> -<span 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class="sourceLineNo">372</span><a name="line.372"></a> -<span class="sourceLineNo">373</span> /**<a name="line.373"></a> -<span class="sourceLineNo">374</span> * Environment priority comparator.<a name="line.374"></a> -<span class="sourceLineNo">375</span> * Coprocessors are chained in sorted order.<a name="line.375"></a> -<span class="sourceLineNo">376</span> */<a name="line.376"></a> -<span class="sourceLineNo">377</span> static class EnvironmentPriorityComparator implements Comparator<CoprocessorEnvironment> {<a name="line.377"></a> -<span class="sourceLineNo">378</span> @Override<a name="line.378"></a> -<span class="sourceLineNo">379</span> public int compare(final CoprocessorEnvironment env1,<a name="line.379"></a> -<span class="sourceLineNo">380</span> final CoprocessorEnvironment env2) {<a name="line.380"></a> -<span class="sourceLineNo">381</span> if (env1.getPriority() < env2.getPriority()) {<a name="line.381"></a> -<span class="sourceLineNo">382</span> return -1;<a 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class="sourceLineNo">465</span> * Used to gracefully handle fallback to deprecated methods when we<a name="line.465"></a> -<span class="sourceLineNo">466</span> * evolve coprocessor APIs.<a name="line.466"></a> -<span class="sourceLineNo">467</span> *<a name="line.467"></a> -<span class="sourceLineNo">468</span> * When a particular Coprocessor API is updated to change methods, hosts can support fallback<a name="line.468"></a> -<span class="sourceLineNo">469</span> * to the deprecated API by using this method to determine if an instance implements the new API.<a name="line.469"></a> -<span class="sourceLineNo">470</span> * In the event that said support is partial, then in the face of a runtime issue that prevents<a name="line.470"></a> -<span class="sourceLineNo">471</span> * proper operation {@link #legacyWarning(Class, String)} should be used to let operators know.<a name="line.471"></a> -<span class="sourceLineNo">472</span> *<a name="line.472"></a> -<span 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method " +<a name="line.491"></a> -<span class="sourceLineNo">492</span> "signature. Skipping legacy support for invocations in '" + clazz +"'.");<a name="line.492"></a> -<span class="sourceLineNo">493</span> useLegacy = false;<a name="line.493"></a> -<span class="sourceLineNo">494</span> } catch (NoSuchMethodException exception) {<a name="line.494"></a> -<span class="sourceLineNo">495</span> useLegacy = true;<a name="line.495"></a> -<span class="sourceLineNo">496</span> } catch (SecurityException exception) {<a name="line.496"></a> -<span class="sourceLineNo">497</span> LOG.warn("The Security Manager denied our attempt to detect if the coprocessor '" + clazz +<a name="line.497"></a> -<span class="sourceLineNo">498</span> "' requires legacy support; assuming it does. 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Your coprocessor will not see these events. Please update '" + clazz +<a name="line.532"></a> -<span class="sourceLineNo">533</span> "'. Details of the problem: " + message);<a name="line.533"></a> -<span class="sourceLineNo">534</span> }<a name="line.534"></a> -<span class="sourceLineNo">535</span> }<a name="line.535"></a> -<span class="sourceLineNo">536</span><a name="line.536"></a> -<span class="sourceLineNo">537</span> /**<a name="line.537"></a> -<span class="sourceLineNo">538</span> * Implementations defined function to get an observer of type {@code O} from a coprocessor of<a name="line.538"></a> -<span class="sourceLineNo">539</span> * type {@code C}. Concrete implementations of CoprocessorHost define one getter for each<a name="line.539"></a> -<span class="sourceLineNo">540</span> * observer they can handle. 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class="sourceLineNo">634</span><a name="line.634"></a> -<span class="sourceLineNo">635</span> // what does bypass mean?<a name="line.635"></a> -<span class="sourceLineNo">636</span> protected <O, R> R execOperationWithResult(final boolean ifBypass, final R defaultValue,<a name="line.636"></a> -<span class="sourceLineNo">637</span> final ObserverOperationWithResult<O, R> observerOperation) throws IOException {<a name="line.637"></a> -<span class="sourceLineNo">638</span> if (observerOperation == null) {<a name="line.638"></a> -<span class="sourceLineNo">639</span> return ifBypass ? null : defaultValue;<a name="line.639"></a> -<span class="sourceLineNo">640</span> } else {<a name="line.640"></a> -<span class="sourceLineNo">641</span> observerOperation.setResult(defaultValue);<a name="line.641"></a> -<span class="sourceLineNo">642</span> boolean bypass = execOperation(true, observerOperation);<a name="line.642"></a> -<span class="sourceLineNo">643</span> R result = 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observerOperation) throws IOException {<a name="line.654"></a> -<span class="sourceLineNo">655</span> if (observerOperation == null) return false;<a name="line.655"></a> -<span class="sourceLineNo">656</span> boolean bypass = false;<a name="line.656"></a> -<span class="sourceLineNo">657</span> List<E> envs = coprocEnvironments.get();<a name="line.657"></a> -<span class="sourceLineNo">658</span> for (E env : envs) {<a name="line.658"></a> -<span class="sourceLineNo">659</span> observerOperation.prepare(env);<a name="line.659"></a> -<span class="sourceLineNo">660</span> Thread currentThread = Thread.currentThread();<a name="line.660"></a> -<span class="sourceLineNo">661</span> ClassLoader cl = currentThread.getContextClassLoader();<a name="line.661"></a> -<span class="sourceLineNo">662</span> try {<a name="line.662"></a> -<span class="sourceLineNo">663</span> currentThread.setContextClassLoader(env.getClassLoader());<a name="line.663"></a> -<span class="sourceLineNo">664</span> observerOperation.callObserver();<a name="line.664"></a> -<span class="sourceLineNo">665</span> } catch (Throwable e) {<a name="line.665"></a> -<span class="sourceLineNo">666</span> handleCoprocessorThrowable(env, e);<a name="line.666"></a> -<span class="sourceLineNo">667</span> } finally {<a name="line.667"></a> -<span class="sourceLineNo">668</span> currentThread.setContextClassLoader(cl);<a name="line.668"></a> -<span class="sourceLineNo">669</span> }<a name="line.669"></a> -<span class="sourceLineNo">670</span> bypass |= observerOperation.shouldBypass();<a name="line.670"></a> -<span class="sourceLineNo">671</span> if (earlyExit && observerOperation.shouldComplete()) {<a name="line.671"></a> -<span class="sourceLineNo">672</span> break;<a name="line.672"></a> -<span class="sourceLineNo">673</span> }<a name="line.673"></a> -<span class="sourceLineNo">674</span> observerOperation.postEnvCall();<a name="line.674"></a> -<span class="sourceLineNo">675</span> }<a name="line.675"></a> 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true;<a name="line.76"></a> +<span class="sourceLineNo">077</span> public static final String USER_COPROCESSORS_ENABLED_CONF_KEY =<a name="line.77"></a> +<span class="sourceLineNo">078</span> "hbase.coprocessor.user.enabled";<a name="line.78"></a> +<span class="sourceLineNo">079</span> public static final boolean DEFAULT_USER_COPROCESSORS_ENABLED = true;<a name="line.79"></a> +<span class="sourceLineNo">080</span><a name="line.80"></a> +<span class="sourceLineNo">081</span> private static final Log LOG = LogFactory.getLog(CoprocessorHost.class);<a name="line.81"></a> +<span class="sourceLineNo">082</span> protected Abortable abortable;<a name="line.82"></a> +<span class="sourceLineNo">083</span> /** Ordered set of loaded coprocessors with lock */<a name="line.83"></a> +<span class="sourceLineNo">084</span> protected final SortedList<E> coprocEnvironments =<a name="line.84"></a> +<span class="sourceLineNo">085</span> new SortedList<>(new EnvironmentPriorityComparator());<a name="line.85"></a> +<span class="sourceLineNo">086</span> protected Configuration conf;<a name="line.86"></a> +<span class="sourceLineNo">087</span> // unique file prefix to use for local copies of jars when classloading<a name="line.87"></a> +<span class="sourceLineNo">088</span> protected String pathPrefix;<a name="line.88"></a> +<span class="sourceLineNo">089</span> protected AtomicInteger loadSequence = new AtomicInteger();<a name="line.89"></a> +<span class="sourceLineNo">090</span><a name="line.90"></a> +<span class="sourceLineNo">091</span> public CoprocessorHost(Abortable abortable) {<a name="line.91"></a> +<span class="sourceLineNo">092</span> this.abortable = abortable;<a name="line.92"></a> +<span class="sourceLineNo">093</span> this.pathPrefix = UUID.randomUUID().toString();<a name="line.93"></a> +<span class="sourceLineNo">094</span> }<a name="line.94"></a> +<span class="sourceLineNo">095</span><a name="line.95"></a> +<span class="sourceLineNo">096</span> /**<a name="line.96"></a> +<span class="sourceLineNo">097</span> * Not to be confused with the per-object _coprocessors_ (above),<a name="line.97"></a> +<span class="sourceLineNo">098</span> * coprocessorNames is static and stores the set of all coprocessors ever<a name="line.98"></a> +<span class="sourceLineNo">099</span> * loaded by any thread in this JVM. 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Read the class names from configuration.<a name="line.129"></a> +<span class="sourceLineNo">130</span> * Called by constructor.<a name="line.130"></a> +<span class="sourceLineNo">131</span> */<a name="line.131"></a> +<span class="sourceLineNo">132</span> protected void loadSystemCoprocessors(Configuration conf, String confKey) {<a name="line.132"></a> +<span class="sourceLineNo">133</span> boolean coprocessorsEnabled = conf.getBoolean(COPROCESSORS_ENABLED_CONF_KEY,<a name="line.133"></a> +<span class="sourceLineNo">134</span> DEFAULT_COPROCESSORS_ENABLED);<a name="line.134"></a> +<span class="sourceLineNo">135</span> if (!coprocessorsEnabled) {<a name="line.135"></a> +<span class="sourceLineNo">136</span> return;<a name="line.136"></a> +<span class="sourceLineNo">137</span> }<a name="line.137"></a> +<span class="sourceLineNo">138</span><a name="line.138"></a> +<span class="sourceLineNo">139</span> Class<?> implClass;<a name="line.139"></a> +<span class="sourceLineNo">140</span><a name="line.140"></a> +<span class="sourceLineNo">141</span> // load default coprocessors from configure file<a name="line.141"></a> +<span class="sourceLineNo">142</span> String[] defaultCPClasses = conf.getStrings(confKey);<a name="line.142"></a> +<span class="sourceLineNo">143</span> if (defaultCPClasses == null || defaultCPClasses.length == 0)<a name="line.143"></a> +<span class="sourceLineNo">144</span> return;<a name="line.144"></a> +<span class="sourceLineNo">145</span><a name="line.145"></a> +<span class="sourceLineNo">146</span> int priority = Coprocessor.PRIORITY_SYSTEM;<a name="line.146"></a> +<span class="sourceLineNo">147</span> for (String className : defaultCPClasses) {<a name="line.147"></a> +<span class="sourceLineNo">148</span> className = className.trim();<a name="line.148"></a> +<span class="sourceLineNo">149</span> if (findCoprocessor(className) != null) {<a name="line.149"></a> +<span class="sourceLineNo">150</span> // If already loaded will just continue<a name="line.150"></a> +<span class="sourceLineNo">151</span> LOG.warn("Attempted duplicate loading of " + className + "; skipped");<a name="line.151"></a> +<span class="sourceLineNo">152</span> continue;<a name="line.152"></a> +<span class="sourceLineNo">153</span> }<a name="line.153"></a> +<span class="sourceLineNo">154</span> ClassLoader cl = this.getClass().getClassLoader();<a name="line.154"></a> +<span class="sourceLineNo">155</span> Thread.currentThread().setContextClassLoader(cl);<a name="line.155"></a> +<span class="sourceLineNo">156</span> try {<a name="line.156"></a> +<span class="sourceLineNo">157</span> implClass = cl.loadClass(className);<a name="line.157"></a> +<span class="sourceLineNo">158</span> // Add coprocessors as we go to guard against case where a coprocessor is specified twice<a name="line.158"></a> +<span class="sourceLineNo">159</span> // in the configuration<a name="line.159"></a> +<span class="sourceLineNo">160</span> E env = checkAndLoadInstance(implClass, priority, conf);<a name="line.160"></a> +<span class="sourceLineNo">161</span> if (env != null) {<a name="line.161"></a> +<span class="sourceLineNo">162</span> this.coprocEnvironments.add(env);<a name="line.162"></a> +<span class="sourceLineNo">163</span> LOG.info(<a name="line.163"></a> +<span class="sourceLineNo">164</span> "System coprocessor " + className + " was loaded " + "successfully with priority (" + priority + ").");<a name="line.164"></a> +<span class="sourceLineNo">165</span> ++priority;<a name="line.165"></a> +<span class="sourceLineNo">166</span> }<a name="line.166"></a> +<span class="sourceLineNo">167</span> } catch (Throwable t) {<a name="line.167"></a> +<span class="sourceLineNo">168</span> // We always abort if system coprocessors cannot be loaded<a name="line.168"></a> +<span class="sourceLineNo">169</span> abortServer(className, t);<a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span> }<a name="line.171"></a> +<span class="sourceLineNo">172</span> }<a name="line.172"></a> +<span class="sourceLineNo">173</span><a name="line.173"></a> +<span class="sourceLineNo">174</span> /**<a name="line.174"></a> +<span class="sourceLineNo">175</span> * Load a coprocessor implementation into the host<a name="line.175"></a> +<span class="sourceLineNo">176</span> * @param path path to implementation jar<a name="line.176"></a> +<span class="sourceLineNo">177</span> * @param className the main class name<a name="line.177"></a> +<span class="sourceLineNo">178</span> * @param priority chaining priority<a name="line.178"></a> +<span class="sourceLineNo">179</span> * @param conf configuration for coprocessor<a name="line.179"></a> +<span class="sourceLineNo">180</span> * @throws java.io.IOException Exception<a name="line.180"></a> +<span class="sourceLineNo">181</span> */<a name="line.181"></a> +<span class="sourceLineNo">182</span> public E load(Path path, String className, int priority,<a name="line.182"></a> +<span class="sourceLineNo">183</span> Configuration conf) throws IOException {<a name="line.183"></a> +<span class="sourceLineNo">184</span> String[] includedClassPrefixes = null;<a name="line.184"></a> +<span class="sourceLineNo">185</span> if (conf.get(HConstants.CP_HTD_ATTR_INCLUSION_KEY) != null){<a name="line.185"></a> +<span class="sourceLineNo">186</span> String prefixes = conf.get(HConstants.CP_HTD_ATTR_INCLUSION_KEY);<a name="line.186"></a> +<span class="sourceLineNo">187</span> includedClassPrefixes = prefixes.split(";");<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> +<span class="sourceLineNo">189</span> return load(path, className, priority, conf, includedClassPrefixes);<a name="line.189"></a> +<span class="sourceLineNo">190</span> }<a name="line.190"></a> +<span class="sourceLineNo">191</span><a name="line.191"></a> +<span class="sourceLineNo">192</span> /**<a name="line.192"></a> +<span class="sourceLineNo">193</span> * Load a coprocessor implementation into the host<a name="line.193"></a> +<span class="sourceLineNo">194</span> * @param path path to implementation jar<a name="line.194"></a> +<span class="sourceLineNo">195</span> * @param className the main class name<a name="line.195"></a> +<span class="sourceLineNo">196</span> * @param priority chaining priority<a name="line.196"></a> +<span class="sourceLineNo">197</span> * @param conf configuration for coprocessor<a name="line.197"></a> +<span class="sourceLineNo">198</span> * @param includedClassPrefixes class name prefixes to include<a name="line.198"></a> +<span class="sourceLineNo">199</span> * @throws java.io.IOException Exception<a name="line.199"></a> +<span class="sourceLineNo">200</span> */<a name="line.200"></a> +<span class="sourceLineNo">201</span> public E load(Path path, String className, int priority,<a name="line.201"></a> +<span class="sourceLineNo">202</span> Configuration conf, String[] includedClassPrefixes) throws IOException {<a name="line.202"></a> +<span class="sourceLineNo">203</span> Class<?> implClass;<a name="line.203"></a> +<span class="sourceLineNo">204</span> LOG.debug("Loading coprocessor class " + className + " with path " +<a name="line.204"></a> +<span class="sourceLineNo">205</span> path + " and priority " + priority);<a name="line.205"></a> +<span class="sourceLineNo">206</span><a name="line.206"></a> +<span class="sourceLineNo">207</span> ClassLoader cl = null;<a name="line.207"></a> +<span class="sourceLineNo">208</span> if (path == null) {<a name="line.208"></a> +<span class="sourceLineNo">209</span> try {<a name="line.209"></a> +<span class="sourceLineNo">210</span> implClass = getClass().getClassLoader().loadClass(className);<a name="line.210"></a> +<span class="sourceLineNo">211</span> } catch (ClassNotFoundException e) {<a name="line.211"></a> +<span class="sourceLineNo">212</span> throw new IOException("No jar path specified for " + className);<a name="line.212"></a> +<span class="sourceLineNo">213</span> }<a name="line.213"></a> +<span class="sourceLineNo">214</span> } else {<a name="line.214"></a> +<span class="sourceLineNo">215</span> cl = CoprocessorClassLoader.getClassLoader(<a name="line.215"></a> +<span class="sourceLineNo">216</span> path, getClass().getClassLoader(), pathPrefix, conf);<a name="line.216"></a> +<span class="sourceLineNo">217</span> try {<a name="line.217"></a> +<span class="sourceLineNo">218</span> implClass = ((CoprocessorClassLoader)cl).loadClass(className, includedClassPrefixes);<a name="line.218"></a> +<span class="sourceLineNo">219</span> } catch (ClassNotFoundException e) {<a name="line.219"></a> +<span class="sourceLineNo">220</span> throw new IOException("Cannot load external coprocessor class " + className, e);<a name="line.220"></a> +<span class="sourceLineNo">221</span> }<a name="line.221"></a> +<span class="sourceLineNo">222</span> }<a name="line.222"></a> +<span class="sourceLineNo">223</span><a name="line.223"></a> +<span class="sourceLineNo">224</span> //load custom code for coprocessor<a name="line.224"></a> +<span class="sourceLineNo">225</span> Thread currentThread = Thread.currentThread();<a name="line.225"></a> +<span class="sourceLineNo">226</span> ClassLoader hostClassLoader = currentThread.getContextClassLoader();<a name="line.226"></a> +<span class="sourceLineNo">227</span> try{<a name="line.227"></a> +<span class="sourceLineNo">228</span> // switch temporarily to the thread classloader for custom CP<a name="line.228"></a> +<span class="sourceLineNo">229</span> currentThread.setContextClassLoader(cl);<a name="line.229"></a> +<span class="sourceLineNo">230</span> E cpInstance = checkAndLoadInstance(implClass, priority, conf);<a name="line.230"></a> +<span class="sourceLineNo">231</span> return cpInstance;<a name="line.231"></a> +<span class="sourceLineNo">232</span> } finally {<a name="line.232"></a> +<span class="sourceLineNo">233</span> // restore the fresh (host) classloader<a name="line.233"></a> +<span class="sourceLineNo">234</span> currentThread.setContextClassLoader(hostClassLoader);<a name="line.234"></a> +<span class="sourceLineNo">235</span> }<a name="line.235"></a> +<span class="sourceLineNo">236</span> }<a name="line.236"></a> +<span class="sourceLineNo">237</span><a name="line.237"></a> +<span class="sourceLineNo">238</span> @VisibleForTesting<a name="line.238"></a> +<span class="sourceLineNo">239</span> public void load(Class<? extends C> implClass, int priority, Configuration conf)<a name="line.239"></a> +<span class="sourceLineNo">240</span> throws IOException {<a name="line.240"></a> +<span class="sourceLineNo">241</span> E env = checkAndLoadInstance(implClass, priority, conf);<a name="line.241"></a> +<span class="sourceLineNo">242</span> coprocEnvironments.add(env);<a name="line.242"></a> +<span class="sourceLineNo">243</span> }<a name="line.243"></a> +<span class="sourceLineNo">244</span><a name="line.244"></a> +<span class="sourceLineNo">245</span> /**<a name="line.245"></a> +<span class="sourceLineNo">246</span> * @param implClass Implementation class<a name="line.246"></a> +<span class="sourceLineNo">247</span> * @param priority priority<a name="line.247"></a> +<span class="sourceLineNo">248</span> * @param conf configuration<a name="line.248"></a> +<span class="sourceLineNo">249</span> * @throws java.io.IOException Exception<a name="line.249"></a> +<span class="sourceLineNo">250</span> */<a name="line.250"></a> +<span class="sourceLineNo">251</span> public E checkAndLoadInstance(Class<?> implClass, int priority, Configuration conf)<a name="line.251"></a> +<span class="sourceLineNo">252</span> throws IOException {<a name="line.252"></a> +<span class="sourceLineNo">253</span> // create the instance<a name="line.253"></a> +<span class="sourceLineNo">254</span> C impl;<a name="line.254"></a> +<span class="sourceLineNo">255</span> try {<a name="line.255"></a> +<span class="sourceLineNo">256</span> impl = checkAndGetInstance(implClass);<a name="line.256"></a> +<span class="sourceLineNo">257</span> if (impl == null) {<a name="line.257"></a> +<span class="sourceLineNo">258</span> LOG.error("Cannot load coprocessor " + implClass.getSimpleName());<a name="line.258"></a> +<span class="sourceLineNo">259</span> return null;<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<a name="line.260"></a> +<span class="sourceLineNo">261</span> } catch (InstantiationException|IllegalAccessException e) {<a name="line.261"></a> +<span class="sourceLineNo">262</span> throw new IOException(e);<a name="line.262"></a> +<span class="sourceLineNo">263</span> }<a name="line.263"></a> +<span class="sourceLineNo">264</span> // create the environment<a name="line.264"></a> +<span class="sourceLineNo">265</span> E env = createEnvironment(impl, priority, loadSequence.incrementAndGet(), conf);<a name="line.265"></a> +<span class="sourceLineNo">266</span> env.startup();<a name="line.266"></a> +<span class="sourceLineNo">267</span> // HBASE-4014: maintain list of loaded coprocessors for later crash analysis<a name="line.267"></a> +<span class="sourceLineNo">268</span> // if server (master or regionserver) aborts.<a name="line.268"></a> +<span class="sourceLineNo">269</span> coprocessorNames.add(implClass.getName());<a name="line.269"></a> +<span class="sourceLineNo">270</span> return env;<a name="line.270"></a> +<span class="sourceLineNo">271</span> }<a name="line.271"></a> +<span class="sourceLineNo">272</span><a name="line.272"></a> +<span class="sourceLineNo">273</span> /**<a name="line.273"></a> +<span class="sourceLineNo">274</span> * Called when a new Coprocessor class is loaded<a name="line.274"></a> +<span class="sourceLineNo">275</span> */<a name="line.275"></a> +<span class="sourceLineNo">276</span> public abstract E createEnvironment(C instance, int priority, int sequence, Configuration conf);<a name="line.276"></a> +<span class="sourceLineNo">277</span><a name="line.277"></a> +<span class="sourceLineNo">278</span> /**<a name="line.278"></a> +<span class="sourceLineNo">279</span> * Called when a new Coprocessor class needs to be loaded. Checks if type of the given class<a name="line.279"></a> +<span class="sourceLineNo">280</span> * is what the corresponding host implementation expects. If it is of correct type, returns an<a name="line.280"></a> +<span class="sourceLineNo">281</span> * instance of the coprocessor to be loaded. If not, returns null.<a name="line.281"></a> +<span class="sourceLineNo">282</span> * If an exception occurs when trying to create instance of a coprocessor, it's passed up and<a name="line.282"></a> +<span class="sourceLineNo">283</span> * eventually results into server aborting.<a name="line.283"></a> +<span class="sourceLineNo">284</span> */<a name="line.284"></a> +<span class="sourceLineNo">285</span> public abstract C checkAndGetInstance(Class<?> implClass)<a name="line.285"></a> +<span class="sourceLineNo">286</span> throws InstantiationException, IllegalAccessException;<a name="line.286"></a> +<span class="sourceLineNo">287</span><a name="line.287"></a> +<span class="sourceLineNo">288</span> public void shutdown(E e) {<a name="line.288"></a> +<span class="sourceLineNo">289</span> if (LOG.isDebugEnabled()) {<a name="line.289"></a> +<span class="sourceLineNo">290</span> LOG.debug("Stop coprocessor " + e.getInstance().getClass().getName());<a name="line.290"></a> +<span class="sourceLineNo">291</span> }<a name="line.291"></a> +<span class="sourceLineNo">292</span> e.shutdown();<a name="line.292"></a> +<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">294</span><a name="line.294"></a> +<span class="sourceLineNo">295</span> /**<a name="line.295"></a> +<span class="sourceLineNo">296</span> * Find coprocessors by full class name or simple name.<a name="line.296"></a> +<span class="sourceLineNo">297</span> */<a name="line.297"></a> +<span class="sourceLineNo">298</span> public C findCoprocessor(String className) {<a name="line.298"></a> +<span class="sourceLineNo">299</span> for (E env: coprocEnvironments) {<a name="line.299"></a> +<span class="sourceLineNo">300</span> if (env.getInstance().getClass().getName().equals(className) ||<a name="line.300"></a> +<span class="sourceLineNo">301</span> env.getInstance().getClass().getSimpleName().equals(className)) {<a name="line.301"></a> +<span class="sourceLineNo">302</span> return env.getInstance();<a name="line.302"></a> +<span class="sourceLineNo">303</span> }<a name="line.303"></a> +<span class="sourceLineNo">304</span> }<a name="line.304"></a> +<span class="sourceLineNo">305</span> return null;<a name="line.305"></a> +<span class="sourceLineNo">306</span> }<a name="line.306"></a> +<span class="sourceLineNo">307</span><a name="line.307"></a> +<span class="sourceLineNo">308</span> @VisibleForTesting<a name="line.308"></a> +<span class="sourceLineNo">309</span> public <T extends C> T findCoprocessor(Class<T> cls) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> for (E env: coprocEnvironments) {<a name="line.310"></a> +<span class="sourceLineNo">311</span> if (cls.isAssignableFrom(env.getInstance().getClass())) {<a name="line.311"></a> +<span class="sourceLineNo">312</span> return (T) env.getInstance();<a name="line.312"></a> +<span class="sourceLineNo">313</span> }<a name="line.313"></a> +<span class="sourceLineNo">314</span> }<a name="line.314"></a> +<span class="sourceLineNo">315</span> return null;<a name="line.315"></a> +<span class="sourceLineNo">316</span> }<a name="line.316"></a> +<span class="sourceLineNo">317</span><a name="line.317"></a> +<span class="sourceLineNo">318</span> /**<a name="line.318"></a> +<span class="sourceLineNo">319</span> * Find list of coprocessors that extend/implement the given class/interface<a name="line.319"></a> +<span class="sourceLineNo">320</span> * @param cls the class/interface to look for<a name="line.320"></a> +<span class="sourceLineNo">321</span> * @return the list of coprocessors, or null if not found<a name="line.321"></a> +<span class="sourceLineNo">322</span> */<a name="line.322"></a> +<span class="sourceLineNo">323</span> public <T extends C> List<T> findCoprocessors(Class<T> cls) {<a name="line.323"></a> +<span class="sourceLineNo">324</span> ArrayList<T> ret = new ArrayList<>();<a name="line.324"></a> +<span class="sourceLineNo">325</span><a name="line.325"></a> +<span class="sourceLineNo">326</span> for (E env: coprocEnvironments) {<a name="line.326"></a> +<span class="sourceLineNo">327</span> C cp = env.getInstanc
<TRUNCATED>
