com.google.firebase.database.core.view.EventRaiser Maven / Gradle / Ivy
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/*
* Copyright 2017 Google Inc.
*
* 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.google.firebase.database.core.view;
import com.google.firebase.database.core.Context;
import com.google.firebase.database.core.EventTarget;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Each view owns an instance of this class, and it is used to send events to the event target
* thread.
*
* Note that it is safe to post events directly to that thread, since a shutdown will not occur
* unless there are no listeners. If there are no listeners, all instances of this class will be
* cleaned up.
*/
public class EventRaiser {
private static final Logger logger = LoggerFactory.getLogger(EventRaiser.class);
private final EventTarget eventTarget;
public EventRaiser(Context ctx) {
eventTarget = ctx.getEventTarget();
}
public void raiseEvents(final List events) {
logger.debug("Raising {} event(s)", events.size());
// TODO: Use an immutable data structure for events so we don't have to clone to be safe.
final ArrayList eventsClone = new ArrayList<>(events);
eventTarget.postEvent(
new Runnable() {
@Override
public void run() {
for (Event event : eventsClone) {
logger.debug("Raising {}", event);
event.fire();
}
}
});
}
}