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Diffstat (limited to 'qpid/java/junit-toolkit/src/main/org/apache/qpid/junit/extensions/SleepThrottle.java')
-rw-r--r-- | qpid/java/junit-toolkit/src/main/org/apache/qpid/junit/extensions/SleepThrottle.java | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/qpid/java/junit-toolkit/src/main/org/apache/qpid/junit/extensions/SleepThrottle.java b/qpid/java/junit-toolkit/src/main/org/apache/qpid/junit/extensions/SleepThrottle.java deleted file mode 100644 index 2dc4c0e272..0000000000 --- a/qpid/java/junit-toolkit/src/main/org/apache/qpid/junit/extensions/SleepThrottle.java +++ /dev/null @@ -1,81 +0,0 @@ -/* - * - * 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.qpid.junit.extensions; - -/** - * SleepThrottle is a Throttle implementation that generates short pauses using the thread sleep methods. As the pauses - * get shorter, this technique gets more innacurate. In practice, around 100 Hz is the cap rate for accuracy. - * - * <p/><table id="crc"><caption>CRC Card</caption> - * <tr><th> Responsibilities <th> Collaborations - * <tr><td> Accept throttling rate in operations per second. - * <tr><td> Inject short pauses to fill out processing cycles to a specified rate. - * <tr><td> Check against a throttle speed without waiting. - * </table> - * - * @author Rupert Smith - */ -public class SleepThrottle extends BaseThrottle implements Throttle -{ - /** Holds the time of the last call to the throttle method in nano seconds. */ - private long lastTimeNanos; - - /** - * This method can only be called at the rate set by the {@link #setRate} method, if it is called faster than this - * it will inject short pauses to restrict the call rate to that rate. - */ - public void throttle() - { - // Get the current time in nanos. - long currentTimeNanos = System.nanoTime(); - - // Don't introduce any pause on the first call. - if (!firstCall) - { - // Check if there is any time left in the cycle since the last call to this method and introduce a short pause - // to fill that time if there is. - long remainingTimeNanos = cycleTimeNanos - (currentTimeNanos - lastTimeNanos); - - if (remainingTimeNanos > 0) - { - long milliPause = remainingTimeNanos / 1000000; - int nanoPause = (int) (remainingTimeNanos % 1000000); - - try - { - Thread.sleep(milliPause, nanoPause); - } - catch (InterruptedException e) - { - // Restore the interrupted thread, in-case the caller is checking for it. - Thread.currentThread().interrupt(); - } - } - } - else - { - firstCall = false; - } - - // Update the last time stamp. - lastTimeNanos = System.nanoTime(); - } -} |