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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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.vaadin.tests.components.ui;
import java.util.ArrayList;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUIWithLog;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.UI;
import com.vaadin.util.CurrentInstance;
public class CurrentUiRetained extends AbstractTestUIWithLog {
public static class GcProbe {
}
@Override
protected void setup(VaadinRequest request) {
final ArrayList<UI> uiLog = new ArrayList<UI>();
final ArrayList<Boolean> probeLog = new ArrayList<Boolean>();
final Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
uiLog.add(UI.getCurrent());
GcProbe gcProbe = new GcProbe();
CurrentInstance.set(GcProbe.class, gcProbe);
probeLog.add(CurrentInstance.get(GcProbe.class) != null);
gcProbe = null;
Thread.sleep(500l);
System.gc();
Thread.sleep(500l);
probeLog.add(CurrentInstance.get(GcProbe.class) != null);
uiLog.add(UI.getCurrent());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
thread.start();
addComponent(new Button("Show result", new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
try {
thread.join();
log("Correct UI.getCurrent before GC: "
+ (uiLog.get(0) == CurrentUiRetained.this));
log("Correct UI.getCurrent after GC: "
+ (uiLog.get(1) == CurrentUiRetained.this));
log("GC probe available before GC: " + probeLog.get(0));
log("GC probe available after GC: " + probeLog.get(1));
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}));
}
@Override
protected String getTestDescription() {
return "Tests that garbage collection removes stale CurrentInstance values while retaining values not collected.";
}
@Override
protected Integer getTicketNumber() {
return Integer.valueOf(12509);
}
}
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