| // 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.cloudstack.ha; |
| |
| import java.util.concurrent.Future; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public final class HAResourceCounter { |
| private AtomicLong activityCheckCounter = new AtomicLong(0); |
| private AtomicLong activityCheckFailureCounter = new AtomicLong(0); |
| private AtomicLong recoveryOperationCounter = new AtomicLong(0); |
| |
| private Long firstHealthCheckFailureTimestamp; |
| private Long lastActivityCheckTimestamp; |
| private Long degradedTimestamp; |
| private Long recoverTimestamp; |
| private Future<Boolean> recoveryFuture; |
| private Future<Boolean> fenceFuture; |
| |
| public long getActivityCheckCounter() { |
| return activityCheckCounter.get(); |
| } |
| |
| public long getRecoveryCounter() { |
| return recoveryOperationCounter.get(); |
| } |
| |
| public synchronized void incrActivityCounter(final boolean isFailure) { |
| activityCheckCounter.incrementAndGet(); |
| if (isFailure) { |
| activityCheckFailureCounter.incrementAndGet(); |
| } |
| } |
| |
| public synchronized void incrRecoveryCounter() { |
| recoveryOperationCounter.incrementAndGet(); |
| } |
| |
| public synchronized void resetActivityCounter() { |
| activityCheckCounter.set(0); |
| activityCheckFailureCounter.set(0); |
| } |
| |
| public synchronized void resetRecoveryCounter() { |
| recoverTimestamp = null; |
| recoveryFuture = null; |
| recoveryOperationCounter.set(0); |
| } |
| |
| public synchronized void resetSuspectTimestamp() { |
| firstHealthCheckFailureTimestamp = null; |
| } |
| |
| public boolean hasActivityThresholdExceeded(final double failureRatio) { |
| return activityCheckFailureCounter.get() > (activityCheckCounter.get() * failureRatio); |
| } |
| |
| public synchronized boolean canPerformActivityCheck(final Long activityCheckInterval) { |
| if (lastActivityCheckTimestamp == null || (System.currentTimeMillis() - lastActivityCheckTimestamp) > (activityCheckInterval * 1000)) { |
| lastActivityCheckTimestamp = System.currentTimeMillis(); |
| return true; |
| } |
| return false; |
| } |
| |
| public boolean canRecheckActivity(final Long maxDegradedPeriod) { |
| return degradedTimestamp == null || (System.currentTimeMillis() - degradedTimestamp) > (maxDegradedPeriod * 1000); |
| } |
| |
| public boolean canExitRecovery(final Long maxRecoveryWaitPeriod) { |
| return recoverTimestamp != null && (System.currentTimeMillis() - recoverTimestamp) > (maxRecoveryWaitPeriod * 1000); |
| } |
| |
| public long getSuspectTimeStamp() { |
| if (firstHealthCheckFailureTimestamp == null) { |
| firstHealthCheckFailureTimestamp = System.currentTimeMillis(); |
| } |
| return firstHealthCheckFailureTimestamp; |
| } |
| |
| public synchronized void markResourceSuspected() { |
| firstHealthCheckFailureTimestamp = System.currentTimeMillis(); |
| } |
| |
| public synchronized void markResourceDegraded() { |
| degradedTimestamp = System.currentTimeMillis(); |
| } |
| |
| public synchronized void markRecoveryStarted() { |
| if (recoverTimestamp == null) { |
| recoverTimestamp = System.currentTimeMillis(); |
| } |
| } |
| |
| public synchronized void markRecoveryCompleted() { |
| recoverTimestamp = null; |
| recoveryFuture = null; |
| } |
| |
| public void setRecoveryFuture(final Future<Boolean> future) { |
| recoveryFuture = future; |
| } |
| |
| public boolean canAttemptRecovery() { |
| return recoveryFuture == null || recoveryFuture.isDone(); |
| } |
| |
| public void setFenceFuture(final Future<Boolean> future) { |
| fenceFuture = future; |
| } |
| |
| public boolean canAttemptFencing() { |
| return fenceFuture == null || fenceFuture.isDone(); |
| } |
| |
| } |