| /* |
| * Copyright 2000-2012 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| package org.jetbrains.idea.svn.svnkit.lowLevel; |
| |
| import com.intellij.openapi.Disposable; |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.progress.ProgressIndicator; |
| import com.intellij.openapi.progress.ProgressManager; |
| import com.intellij.util.containers.hash.HashSet; |
| import org.tmatesoft.svn.core.SVNErrorCode; |
| import org.tmatesoft.svn.core.SVNErrorMessage; |
| import org.tmatesoft.svn.core.SVNException; |
| |
| import java.util.Set; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Created with IntelliJ IDEA. |
| * User: Irina.Chernushina |
| * Date: 7/31/12 |
| * Time: 6:19 PM |
| */ |
| public class ApplicationLevelNumberConnectionsGuardImpl implements Disposable, ApplicationLevelNumberConnectionsGuard { |
| public static final int DELAY = 20000; |
| |
| private final Object myLock; |
| private final Set<CachingSvnRepositoryPool> mySet; |
| private int myCurrentlyActiveConnections; |
| private int myCurrentlyOpenedConnections; |
| private boolean myDisposed; |
| |
| private int myInstanceCount; // refreshable instances |
| private final ScheduledExecutorService myService; |
| private ScheduledFuture<?> myFuture; |
| private final Runnable myRecheck; |
| private int myDelay; |
| private int myCurrentlyOpenedCount; |
| |
| public ApplicationLevelNumberConnectionsGuardImpl() { |
| myDelay = DELAY; |
| mySet = new HashSet<CachingSvnRepositoryPool>(); |
| myService = Executors.newSingleThreadScheduledExecutor(); |
| myLock = new Object(); |
| myDisposed = false; |
| myRecheck = new Runnable() { |
| @Override |
| public void run() { |
| HashSet<CachingSvnRepositoryPool> pools = new HashSet<CachingSvnRepositoryPool>(); |
| synchronized (myLock) { |
| pools.addAll(mySet); |
| } |
| for (CachingSvnRepositoryPool pool : pools) { |
| pool.check(); |
| } |
| } |
| }; |
| myCurrentlyActiveConnections = 0; |
| myCurrentlyOpenedConnections = 0; |
| } |
| |
| public void setDelay(int delay) { |
| assert ApplicationManager.getApplication().isUnitTestMode(); |
| myDelay = delay; |
| myFuture.cancel(true); |
| myFuture = myService.scheduleWithFixedDelay(myRecheck, myDelay, myDelay, TimeUnit.MILLISECONDS); |
| } |
| |
| public int getCurrentlyActiveConnections() { |
| synchronized (myLock) { |
| assert ApplicationManager.getApplication().isUnitTestMode(); |
| return myCurrentlyActiveConnections; |
| } |
| } |
| |
| public int getInstanceCount() { |
| assert ApplicationManager.getApplication().isUnitTestMode(); |
| return myInstanceCount; |
| } |
| |
| public void addRepositoryPool(final CachingSvnRepositoryPool pool) { |
| synchronized (myLock) { |
| mySet.add(pool); |
| ++ myInstanceCount; |
| if (myFuture == null) { |
| myFuture = myService.scheduleWithFixedDelay(myRecheck, myDelay, myDelay, TimeUnit.MILLISECONDS); |
| } |
| } |
| } |
| |
| public void removeRepositoryPool(final CachingSvnRepositoryPool pool) { |
| synchronized (myLock) { |
| mySet.remove(pool); |
| -- myInstanceCount; |
| if (myInstanceCount == 0) { |
| myFuture.cancel(true); |
| myFuture = null; |
| } |
| } |
| } |
| |
| @Override |
| public void connectionCreated() { |
| synchronized (myLock) { |
| ++ myCurrentlyOpenedConnections; |
| } |
| } |
| |
| @Override |
| public void connectionDestroyed(int number) { |
| synchronized (myLock) { |
| myCurrentlyOpenedConnections -= number; |
| } |
| } |
| |
| public void connectionOpened() { |
| synchronized (myLock) { |
| ++ myCurrentlyActiveConnections; |
| } |
| } |
| |
| public void connectionClosed() { |
| synchronized (myLock) { |
| -- myCurrentlyActiveConnections; |
| myLock.notifyAll(); |
| } |
| } |
| |
| @Override |
| public void waitForTotalNumberOfConnectionsOk() throws SVNException { |
| synchronized (myLock) { |
| if (myCurrentlyActiveConnections >= CachingSvnRepositoryPool.ourMaxTotal) { |
| waitForFreeConnections(); |
| } |
| } |
| // maybe too many opened? reduce request |
| final Set<CachingSvnRepositoryPool> copy = new HashSet<CachingSvnRepositoryPool>(); |
| synchronized (myLock) { |
| if (myCurrentlyOpenedConnections >= CachingSvnRepositoryPool.ourMaxTotal) { |
| copy.addAll(mySet); |
| } |
| } |
| for (CachingSvnRepositoryPool pool : copy) { |
| pool.closeInactive(); |
| } |
| synchronized (myLock) { |
| waitForFreeConnections(); |
| } |
| } |
| |
| private void waitForFreeConnections() throws SVNException { |
| synchronized (myLock) { |
| while (myCurrentlyActiveConnections >= CachingSvnRepositoryPool.ourMaxTotal && ! myDisposed) { |
| try { |
| myLock.wait(500); |
| } |
| catch (InterruptedException e) { |
| // |
| } |
| ProgressIndicator indicator = ProgressManager.getInstance().getProgressIndicator(); |
| if (indicator != null && indicator.isCanceled()) { |
| throw new SVNException(SVNErrorMessage.create(SVNErrorCode.CANCELLED)); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public boolean shouldKeepConnectionLocally() { |
| synchronized (myLock) { |
| if (myCurrentlyActiveConnections > CachingSvnRepositoryPool.ourMaxTotal || |
| myCurrentlyOpenedConnections > CachingSvnRepositoryPool.ourMaxTotal) return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public void dispose() { |
| synchronized (myLock) { |
| myDisposed = true; |
| myLock.notifyAll(); |
| } |
| } |
| |
| public int getCurrentlyOpenedCount() { |
| synchronized (myLock) { |
| return myCurrentlyOpenedCount; |
| } |
| } |
| } |