| /* |
| * Copyright 2000-2009 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 com.intellij.openapi.vcs.changes; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.progress.ProcessCanceledException; |
| import com.intellij.openapi.progress.SomeQueue; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Getter; |
| import com.intellij.util.Alarm; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| @SomeQueue |
| public class ControlledCycle { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.vcs.changes.ControlledCycle"); |
| |
| private final Alarm mySimpleAlarm; |
| // this interval is also to check for not initialized paths, so it is rather small |
| private static final int ourRefreshInterval = 10000; |
| private int myRefreshInterval; |
| private final Runnable myRunnable; |
| |
| private final AtomicBoolean myActive; |
| |
| public ControlledCycle(final Project project, final Getter<Boolean> callback, @NotNull final String name, final int refreshInterval) { |
| myRefreshInterval = (refreshInterval <= 0) ? ourRefreshInterval : refreshInterval; |
| myActive = new AtomicBoolean(false); |
| myRunnable = new Runnable() { |
| boolean shouldBeContinued = true; |
| public void run() { |
| if (! myActive.get() || project.isDisposed()) return; |
| try { |
| shouldBeContinued = callback.get(); |
| } catch (ProcessCanceledException e) { |
| return; |
| } catch (RuntimeException e) { |
| LOG.info(e); |
| } |
| if (! shouldBeContinued) { |
| myActive.set(false); |
| } else { |
| mySimpleAlarm.addRequest(myRunnable, myRefreshInterval); |
| } |
| } |
| }; |
| mySimpleAlarm = new Alarm(Alarm.ThreadToUse.POOLED_THREAD, project); |
| } |
| |
| public boolean startIfNotStarted(final int refreshInterval) { |
| final boolean refreshIntervalChanged = (refreshInterval > 0) && refreshInterval != myRefreshInterval; |
| if (refreshIntervalChanged) { |
| mySimpleAlarm.cancelAllRequests(); |
| } |
| if (refreshInterval > 0) { |
| myRefreshInterval = refreshInterval; |
| } |
| |
| final boolean wasSet = myActive.compareAndSet(false, true); |
| if (wasSet || refreshIntervalChanged) { |
| mySimpleAlarm.addRequest(myRunnable, myRefreshInterval); |
| } |
| return wasSet; |
| } |
| |
| public void stop() { |
| myActive.set(false); |
| } |
| } |