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https://issues.apache.org/jira/browse/STORM-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148258#comment-15148258
]
ASF GitHub Bot commented on STORM-1553:
---------------------------------------
Github user abhishekagarwal87 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1110#discussion_r52979325
--- Diff: storm-core/src/jvm/org/apache/storm/event/EventManagerImp.java ---
@@ -0,0 +1,102 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.storm.event;
+
+import org.apache.storm.callback.IRunnableCallback;
+import org.apache.storm.utils.Time;
+import org.apache.storm.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.InterruptedIOException;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class EventManagerImp implements EventManager {
+ private static final Logger LOG =
LoggerFactory.getLogger(EventManagerImp.class);
+
+ private AtomicInteger added;
+ private AtomicInteger processed;
+ private AtomicBoolean running;
+ private Thread runner;
+
+ private LinkedBlockingQueue<IRunnableCallback> queue = new
LinkedBlockingQueue<IRunnableCallback>();
+
+ public EventManagerImp(boolean daemon) {
+ added = new AtomicInteger();
+ processed = new AtomicInteger();
+ running = new AtomicBoolean(true);
+ runner = new Thread() {
+ @Override
+ public void run() {
+ while (running.get()) {
+ try {
+ IRunnableCallback r = queue.take();
+ if (r == null) {
+ return;
+ }
+
+ r.run();
+ proccessinc();
+ } catch (Throwable t) {
+ if
(Utils.exceptionCauseIsInstanceOf(InterruptedIOException.class, t)) {
+ LOG.info("Event manager interrupted while
doing IO");
+ } else if
(Utils.exceptionCauseIsInstanceOf(InterruptedException.class, t)) {
+ LOG.info("Event manager interrupted");
+ } else {
+ LOG.error("{} Error when processing event", t);
+ Utils.exitProcess(20, "Error when processing
an event");
+ }
+ }
+ }
+ }
+ };
+ runner.setDaemon(daemon);
+ runner.start();
+ }
+
+ public void proccessinc() {
+ processed.incrementAndGet();
+ }
+
+ @Override
+ public void add(IRunnableCallback eventFn) {
+ if (!running.get()) {
+ throw new RuntimeException("Cannot add events to a shutdown
event manager");
+ }
+ added.incrementAndGet();
+ queue.add(eventFn);
+ }
+
+ @Override
+ public boolean waiting() {
+ return (Time.isThreadWaiting(runner) || (processed.get() ==
added.get()));
+
--- End diff --
extra line
> port backtype.storm.event to java
> ---------------------------------
>
> Key: STORM-1553
> URL: https://issues.apache.org/jira/browse/STORM-1553
> Project: Apache Storm
> Issue Type: New Feature
> Reporter: John Fang
>
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