diff options
Diffstat (limited to 'cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads')
3 files changed, 0 insertions, 254 deletions
diff --git a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/.gitignore b/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/.gitignore deleted file mode 100644 index 6b468b6..0000000 --- a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/.gitignore +++ /dev/null @@ -1 +0,0 @@ -*.class diff --git a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/TaskThread.java b/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/TaskThread.java deleted file mode 100644 index 97d1520..0000000 --- a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/TaskThread.java +++ /dev/null @@ -1,164 +0,0 @@ -/* - Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this code 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.onap.dcae.cdf.util.threads; - -/** - * A thread with a queue of runnable tasks to execute in the - * thread - */ -public class TaskThread extends Thread { - /** - * Allocates a new TaskThread object. - */ - public TaskThread() { - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(Runnable target) { - super(target); - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(ThreadGroup group, Runnable target) { - super(group, target); - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(String name) { - super(name); - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(ThreadGroup group, String name) { - super(group, name); - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(Runnable target, String name) { - super(target, name); - } - /** - * Allocates a new TaskThread object. - */ - public TaskThread(ThreadGroup group, Runnable target, String name) { - super(group, target, name); - } - /** - * A queued request to be run in the TaskThread - */ - private static class Task { - public Task next; - public Runnable target; - public Task(Runnable target) { - this.target = target; - } - } - private Task head; - private Task tail; - protected boolean closed; - /** - * Queue up a task to be executed by this thread. - */ - protected synchronized void queueRequest(Runnable r) { - Task t = new Task(r); - if (head == null) { - head = t; - wakeup(); - } else { - tail.next = t; - } - tail = t; - } - /** - * Mark as closed and wake up. - */ - protected synchronized void markClosed() { - if (!closed) { - closed = true; - wakeup(); - } - } - /** - * Wait for the next queued request. If closed, return - * null. Relies on the default implementation of wakeup. - */ - protected synchronized Runnable waitNextRequest() { - Task t; - while ((t = head) == null && !closed) { - try { - wait(); - } catch (Exception e) { - } - } - head = t.next; - if (head == null) { - tail = null; - } - return t.target; - } - /** - * Get the next queued request or null if none - */ - protected synchronized Runnable nextRequest() { - Task t = head; - if (t == null) { - return null; - } - head = t.next; - if (head == null) { - tail = null; - } - return t.target; - } - /** - * Wake up the thread to process tasks. - * Implementation depends on what the thread - * is waiting on. The default implementation - * does a this.notify(). - */ - protected void wakeup() { - notify(); - } - /** - * Process any pending requests then return - */ - protected void processQueuedRequests() { - Runnable r; - while ((r = nextRequest()) != null) { - r.run(); - } - } - /** - * Check whether any tasks are pending - */ - protected boolean areTasksPending() { - return (head != null); - } - /** - * Wait for and process pending requests until closed - */ - protected void processRequestsForever() { - Runnable r; - while ((r = waitNextRequest()) != null) { - r.run(); - } - } -} diff --git a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/ThreadUtils.java b/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/ThreadUtils.java deleted file mode 100644 index 34afebe..0000000 --- a/cdf/src/cdf-prop-value/cdf-util/src/main/java/org/onap/dcae/cdf/util/threads/ThreadUtils.java +++ /dev/null @@ -1,89 +0,0 @@ -/* - Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this code 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.onap.dcae.cdf.util.threads; - -import java.util.LinkedList; -import java.util.List; - -/** - * Various utility functions dealing with threads - */ -public class ThreadUtils { - /** - * Get a list of all threads. - * - * @return an array of threads - */ - public static Thread[] getAllThreads() { - ThreadGroup rootGroup = getRootGroup(); - int noThreads = rootGroup.activeCount(); // returns an estimated count of active threads - Thread[] threads = new Thread[noThreads + 1]; - rootGroup.enumerate(threads); - - while ( rootGroup.enumerate( threads, true ) == threads.length ) { // iterate if we filled up the array - threads = new Thread[ threads.length + noThreads ]; - } - // remove null threads - LinkedList<Thread> lthreads = new LinkedList<Thread>(); - for (Thread thread: threads) - if (thread != null) - lthreads.push(thread); - return lthreads.toArray(new Thread[0]); - } - - /** - * Get a list of all threads with a given thread name. - * - * @param name the name to look for - * @return an array of threads with that name - */ - public static Thread[] getNamedThreads(final String name) { - Thread[] allThreads = getAllThreads(); - LinkedList<Thread> lthreads = new LinkedList<Thread>(); - for (Thread thread: allThreads) - if (thread.getName().equals(name)) - lthreads.push(thread); - - return lthreads.toArray(new Thread[0]); - } - - /** - * Get the ultimate root of the threads - * - * @return the root thread - */ - public static ThreadGroup getRootGroup() { - ThreadGroup rootGroup = Thread.currentThread( ).getThreadGroup( ); - ThreadGroup parentGroup; - while ( ( parentGroup = rootGroup.getParent() ) != null ) { - rootGroup = parentGroup; - } - return rootGroup; - } - - public static void main(String args[]) throws Exception { - System.out.println("==== get Root Threads ===="); - System.out.println("Root thread = " + getRootGroup().getName()); - System.out.println("==== get All Threads ===="); - Thread[] threads = getAllThreads(); - for (int i = 0; i < threads.length; i++) - System.out.println("Thread No:" + i + " = " + threads[i].getName()); - System.out.println("==== getNamedThreads(main) ===="); - threads = getNamedThreads("main"); - for (int i = 0; i < threads.length; i++) - System.out.println("Thread No:" + i + " = " + threads[i].getName()); - } -} |