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/*
* Copyright (C) 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.android.mobly.snippet.event;
import android.support.annotation.Nullable;
import com.google.android.mobly.snippet.Snippet;
import com.google.android.mobly.snippet.rpc.Rpc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.TimeUnit;
import org.json.JSONException;
import org.json.JSONObject;
public class EventSnippet implements Snippet {
private static class EventSnippetException extends Exception {
private static final long serialVersionUID = 1L;
public EventSnippetException(String msg) {
super(msg);
}
}
private static final int DEFAULT_TIMEOUT_MILLISECOND = 60 * 1000;
private final EventCache mEventCache = EventCache.getInstance();
@Rpc(
description =
"Blocks until an event of a specified type has been received. The returned event is removed from the cache. Default timeout is 60s.")
public JSONObject eventWaitAndGet(
String callbackId, String eventName, @Nullable Integer timeout)
throws InterruptedException, JSONException, EventSnippetException {
// The server side should never wait forever, so we'll use a default timeout is one is not
// provided.
if (timeout == null) {
timeout = DEFAULT_TIMEOUT_MILLISECOND;
}
String qId = EventCache.getQueueId(callbackId, eventName);
LinkedBlockingDeque<SnippetEvent> q = mEventCache.getEventDeque(qId);
SnippetEvent result = q.pollFirst(timeout, TimeUnit.MILLISECONDS);
if (result == null) {
throw new EventSnippetException("timeout.");
}
return result.toJson();
}
@Rpc(
description =
"Gets and removes all the events of a certain name that have been received so far. "
+ "Non-blocking. Potentially racey since it does not guarantee no event of "
+ "the same name will occur after the call.")
public List<JSONObject> eventGetAll(String callbackId, String eventName)
throws InterruptedException, JSONException {
String qId = EventCache.getQueueId(callbackId, eventName);
LinkedBlockingDeque<SnippetEvent> q = mEventCache.getEventDeque(qId);
ArrayList<JSONObject> results = new ArrayList<>(q.size());
ArrayList<SnippetEvent> buffer = new ArrayList<>(q.size());
q.drainTo(buffer);
for (SnippetEvent snippetEvent : buffer) {
results.add(snippetEvent.toJson());
}
if (results.size() == 0) {
return Collections.emptyList();
}
return results;
}
@Override
public void shutdown() {
mEventCache.clearAll();
}
}
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