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/*
* Copyright (C) 2013 DroidDriver committers
*
* 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 io.appium.droiddriver.base;
import android.os.SystemClock;
import java.util.Collection;
import java.util.LinkedList;
import io.appium.droiddriver.DroidDriver;
import io.appium.droiddriver.Poller;
import io.appium.droiddriver.exceptions.NoRunningActivityException;
import io.appium.droiddriver.exceptions.TimeoutException;
import io.appium.droiddriver.finders.Finder;
/**
* Default implementation of a {@link Poller}.
*/
public class DefaultPoller implements Poller {
private final Collection<TimeoutListener> timeoutListeners = new LinkedList<TimeoutListener>();
private final Collection<PollingListener> pollingListeners = new LinkedList<PollingListener>();
private long timeoutMillis = 10000;
private long intervalMillis = 500;
@Override
public long getIntervalMillis() {
return intervalMillis;
}
@Override
public void setIntervalMillis(long intervalMillis) {
this.intervalMillis = intervalMillis;
}
@Override
public long getTimeoutMillis() {
return timeoutMillis;
}
@Override
public void setTimeoutMillis(long timeoutMillis) {
this.timeoutMillis = timeoutMillis;
}
@Override
public <T> T pollFor(DroidDriver driver, Finder finder, ConditionChecker<T> checker) {
return pollFor(driver, finder, checker, timeoutMillis);
}
@Override
public <T> T pollFor(DroidDriver driver, Finder finder, ConditionChecker<T> checker,
long timeoutMillis) {
long end = SystemClock.uptimeMillis() + timeoutMillis;
while (true) {
try {
try {
driver.refreshUiElementTree();
} catch (NoRunningActivityException nrae) {
if (checker == GONE) {
return null;
}
throw nrae;
}
return checker.check(driver, finder);
} catch (UnsatisfiedConditionException uce) {
// fall through to poll
}
for (PollingListener pollingListener : pollingListeners) {
pollingListener.onPolling(driver, finder);
}
long remainingMillis = end - SystemClock.uptimeMillis();
if (remainingMillis < 0) {
for (TimeoutListener timeoutListener : timeoutListeners) {
timeoutListener.onTimeout(driver, finder);
}
throw new TimeoutException(String.format(
"Timed out after %d milliseconds waiting for %s %s", timeoutMillis, finder, checker));
}
SystemClock.sleep(Math.min(intervalMillis, remainingMillis));
}
}
@Override
public ListenerRemover addListener(final TimeoutListener timeoutListener) {
timeoutListeners.add(timeoutListener);
return new ListenerRemover() {
@Override
public void remove() {
timeoutListeners.remove(timeoutListener);
}
};
}
@Override
public ListenerRemover addListener(final PollingListener pollingListener) {
pollingListeners.add(pollingListener);
return new ListenerRemover() {
@Override
public void remove() {
pollingListeners.remove(pollingListener);
}
};
}
}
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