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author | ARULNA <arul.nambi@amdocs.com> | 2017-06-12 16:41:12 -0400 |
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committer | ARULNA <arul.nambi@amdocs.com> | 2017-06-12 16:41:28 -0400 |
commit | b4922d319d293894fddd512d29b5f0d1411915d9 (patch) | |
tree | 36cec7575f1631aad41d7b1131d6352847ea0de2 /src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java | |
parent | 19dacd2ba38e345eeb5fcfbfe37d615602e8ea44 (diff) |
Initial commit for AAI-UI(sparky-backend)
Change-Id: I785397ed4197663cdf0c1351041d2f708ed08763
Signed-off-by: ARULNA <arul.nambi@amdocs.com>
Diffstat (limited to 'src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java')
-rw-r--r-- | src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java b/src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java new file mode 100644 index 0000000..8cc3409 --- /dev/null +++ b/src/main/java/org/openecomp/sparky/synchronizer/TransactionRateController.java @@ -0,0 +1,113 @@ +/** + * ============LICENSE_START=================================================== + * SPARKY (AAI UI service) + * ============================================================================ + * Copyright © 2017 AT&T Intellectual Property. + * Copyright © 2017 Amdocs + * All rights reserved. + * ============================================================================ + * Licensed 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. + * ============LICENSE_END===================================================== + * + * ECOMP and OpenECOMP are trademarks + * and service marks of AT&T Intellectual Property. + */ + +package org.openecomp.sparky.synchronizer; + +import java.util.concurrent.atomic.AtomicInteger; + +import org.openecomp.sparky.analytics.AveragingRingBuffer; +import org.openecomp.sparky.synchronizer.config.TaskProcessorConfig; + +/** + * TODO: Fill in description. + * + * @author davea. + */ +public class TransactionRateController { + + private AveragingRingBuffer responseTimeTracker; + private double msPerTransaction; + private int numThreads; + private TaskProcessorConfig config; + private long startTimeInMs; + private AtomicInteger numTransactions; + + /** + * Instantiates a new transaction rate controller. + * + * @param config the config + */ + public TransactionRateController(TaskProcessorConfig config) { + + this.config = config; + this.responseTimeTracker = new AveragingRingBuffer( + config.getNumSamplesPerThreadForRunningAverage() * config.getMaxConcurrentWorkers()); + this.msPerTransaction = 1000 / config.getTargetTps(); + this.numThreads = config.getMaxConcurrentWorkers(); + this.startTimeInMs = System.currentTimeMillis(); + this.numTransactions = new AtomicInteger(0); + } + + /** + * Track response time. + * + * @param responseTimeInMs the response time in ms + */ + public void trackResponseTime(long responseTimeInMs) { + this.numTransactions.incrementAndGet(); + responseTimeTracker.addSample(responseTimeInMs); + } + + public long getFixedDelayInMs() { + + /* + * The math here is pretty simple: + * + * 1. Target TPS is 10. Then the msPerTxn = 1000/10 = 100ms + * + * 2. If the calculated avgResponseTime = 40 ms, then the proposed delay is 60ms per thread. + * + * 3. If the calculated avgResponseTime = 200ms, then the proposed delay is -100 ms, which is + * not possible, we can't speed it up, so we don't propose any further delay. + */ + + double proposedDelay = 0; + + if (config.isTransactionRateControllerEnabled()) { + proposedDelay = ((msPerTransaction - responseTimeTracker.getAvg()) * this.numThreads); + + if (proposedDelay > 0) { + return (long) (proposedDelay); + } + } + + return (long) proposedDelay; + } + + public long getAvg() { + return responseTimeTracker.getAvg(); + } + + public double getCurrentTps() { + if (numTransactions.get() > 0) { + double timeDelta = System.currentTimeMillis() - startTimeInMs; + double numTxns = numTransactions.get(); + return (numTxns / timeDelta) * 1000.0; + } + + return 0.0; + } + +} |