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author | Christopher Lott (cl778h) <clott@research.att.com> | 2017-08-31 15:16:38 -0400 |
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committer | Christopher Lott (cl778h) <clott@research.att.com> | 2017-08-31 15:42:50 -0400 |
commit | 7f535078ef80a7b7efa3e3325bfccb994fbd00e8 (patch) | |
tree | 66d908df2eb7cf0b048f754eac6b44619255eb8a /ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java | |
parent | 224487bc124df7988442a60d72d4aa106697306b (diff) |
Rename packages to org.onap in 1.4.0-SNAPSHOT
19 - remove openecomp
72 - remediate Sonar scan issues
79 - removed unwanted left menu under Report
90 - apply approved license text
Issue: PORTAL-19, PORTAL-72, PORTAL-79, PORTAL-90
Change-Id: I41a0ef5fba623d2242574bd15f2d9fb8029a496c
Signed-off-by: Christopher Lott (cl778h) <clott@research.att.com>
Diffstat (limited to 'ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java')
-rw-r--r-- | ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java b/ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java new file mode 100644 index 00000000..eeac444c --- /dev/null +++ b/ecomp-sdk/epsdk-analytics/src/main/java/org/onap/portalsdk/analytics/gmap/utils/SwingWorker.java @@ -0,0 +1,173 @@ +/* + * ============LICENSE_START========================================== + * ONAP Portal SDK + * =================================================================== + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * =================================================================== + * + * Unless otherwise specified, all software contained herein is licensed + * under the Apache License, Version 2.0 (the “License”); + * you may not use this software 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. + * + * Unless otherwise specified, all documentation contained herein is licensed + * under the Creative Commons License, Attribution 4.0 Intl. (the “License”); + * you may not use this documentation except in compliance with the License. + * You may obtain a copy of the License at + * + * https://creativecommons.org/licenses/by/4.0/ + * + * Unless required by applicable law or agreed to in writing, documentation + * 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. + * + * ============LICENSE_END============================================ + * + * ECOMP is a trademark and service mark of AT&T Intellectual Property. + */ +package org.onap.portalsdk.analytics.gmap.utils; + +import javax.swing.SwingUtilities; + +/** + * This is the 3rd version of SwingWorker (also known as + * SwingWorker 3), an abstract class that you subclass to + * perform GUI-related work in a dedicated thread. For + * instructions on using this class, see: + * + * http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html + * + * Note that the API changed slightly in the 3rd version: + * You must now invoke start() on the SwingWorker after + * creating it. + */ +public abstract class SwingWorker { + private Object value; // see getValue(), setValue() + private Thread thread; + + /** + * Class to maintain reference to current worker thread + * under separate synchronization control. + */ + private static class ThreadVar { + private Thread thread; + ThreadVar(Thread t) { thread = t; } + synchronized Thread get() { return thread; } + synchronized void clear() { thread = null; } + } + + private ThreadVar threadVar; + + /** + * Get the value produced by the worker thread, or null if it + * hasn't been constructed yet. + */ + protected synchronized Object getValue() { + return value; + } + + /** + * Set the value produced by worker thread + */ + private synchronized void setValue(Object x) { + value = x; + } + + /** + * Compute the value to be returned by the <code>get</code> method. + */ + public abstract Object construct(); + + /** + * Called on the event dispatching thread (not on the worker thread) + * after the <code>construct</code> method has returned. + */ + public void finished() { + } + + /** + * A new method that interrupts the worker thread. Call this method + * to force the worker to stop what it's doing. + */ + public void interrupt() { + Thread t = threadVar.get(); + if (t != null) { + t.interrupt(); + } + threadVar.clear(); + } + + /** + * Return the value created by the <code>construct</code> method. + * Returns null if either the constructing thread or the current + * thread was interrupted before a value was produced. + * + * @return the value created by the <code>construct</code> method + */ + public Object get() { + while (true) { + Thread t = threadVar.get(); + if (t == null) { + return getValue(); + } + try { + t.join(); + } + catch (InterruptedException e) { + Thread.currentThread().interrupt(); // propagate + return null; + } + } + } + + + /** + * Start a thread that will call the <code>construct</code> method + * and then exit. + */ + public SwingWorker() { + final Runnable doFinished = new Runnable() { + public void run() { finished(); } + }; + + Runnable doConstruct = new Runnable() { + public void run() { + try { + setValue(construct()); + } + finally { + threadVar.clear(); + } + + SwingUtilities.invokeLater(doFinished); + } + }; + + Thread t = new Thread(doConstruct); + threadVar = new ThreadVar(t); + } + + /** + * Start the worker thread. + */ + public void start() { + Thread t = threadVar.get(); + if (t != null) { + t.start(); + } + } + + public Thread getThread() { + return threadVar.get(); + } +} |