2 * Copyright 2011 Google Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.ipc.invalidation.ticl;
19 import static com.google.ipc.invalidation.external.client.SystemResources.Scheduler.NO_DELAY;
21 import com.google.ipc.invalidation.external.client.InvalidationClient;
22 import com.google.ipc.invalidation.external.client.InvalidationListener;
23 import com.google.ipc.invalidation.external.client.SystemResources.Logger;
24 import com.google.ipc.invalidation.external.client.SystemResources.Scheduler;
25 import com.google.ipc.invalidation.external.client.types.AckHandle;
26 import com.google.ipc.invalidation.external.client.types.ErrorInfo;
27 import com.google.ipc.invalidation.external.client.types.Invalidation;
28 import com.google.ipc.invalidation.external.client.types.ObjectId;
29 import com.google.ipc.invalidation.ticl.Statistics.ListenerEventType;
30 import com.google.ipc.invalidation.util.NamedRunnable;
31 import com.google.ipc.invalidation.util.Preconditions;
35 * {@link InvalidationListener} wrapper that ensures that a delegate listener is called on the
36 * proper thread and calls the listener method on the listener thread.
39 class CheckingInvalidationListener implements InvalidationListener {
41 /** The actual listener to which this listener delegates. */
42 private final InvalidationListener delegate;
44 /** The scheduler for scheduling internal events in the library. */
45 private final Scheduler internalScheduler;
47 /** The scheduler for scheduling events for the delegate. */
48 private final Scheduler listenerScheduler;
50 /** Statistics objects to track number of sent messages, etc. */
51 private Statistics statistics;
53 private final Logger logger;
55 CheckingInvalidationListener(InvalidationListener delegate, Scheduler internalScheduler,
56 Scheduler listenerScheduler, Logger logger) {
57 this.delegate = Preconditions.checkNotNull(delegate, "Delegate cannot be null");
58 this.internalScheduler = Preconditions.checkNotNull(internalScheduler,
59 "Internal scheduler cannot be null");
60 this.listenerScheduler = Preconditions.checkNotNull(listenerScheduler,
61 "Listener scheduler cannot be null");
62 this.logger = Preconditions.checkNotNull(logger, "Logger cannot be null");
65 void setStatistics(Statistics statistics) {
66 this.statistics = Preconditions.checkNotNull(statistics, "Statistics cannot be null");
70 public void invalidate(final InvalidationClient client, final Invalidation invalidation,
71 final AckHandle ackHandle) {
72 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
73 Preconditions.checkNotNull(ackHandle);
74 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.invalidate") {
77 statistics.recordListenerEvent(ListenerEventType.INVALIDATE);
78 delegate.invalidate(client, invalidation, ackHandle);
84 public void invalidateUnknownVersion(final InvalidationClient client, final ObjectId objectId,
85 final AckHandle ackHandle) {
86 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
87 Preconditions.checkNotNull(ackHandle);
88 listenerScheduler.schedule(NO_DELAY,
89 new NamedRunnable("CheckingInvalListener.invalidateUnknownVersion") {
92 statistics.recordListenerEvent(ListenerEventType.INVALIDATE_UNKNOWN);
93 delegate.invalidateUnknownVersion(client, objectId, ackHandle);
99 public void invalidateAll(final InvalidationClient client, final AckHandle ackHandle) {
100 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
101 Preconditions.checkNotNull(ackHandle);
102 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.invalidateAll") {
105 statistics.recordListenerEvent(ListenerEventType.INVALIDATE_ALL);
106 delegate.invalidateAll(client, ackHandle);
112 public void informRegistrationFailure(final InvalidationClient client, final ObjectId objectId,
113 final boolean isTransient, final String errorMessage) {
114 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
115 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.regFailure") {
118 statistics.recordListenerEvent(ListenerEventType.INFORM_REGISTRATION_FAILURE);
119 delegate.informRegistrationFailure(client, objectId, isTransient, errorMessage);
125 public void informRegistrationStatus(final InvalidationClient client, final ObjectId objectId,
126 final RegistrationState regState) {
127 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
128 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.regStatus") {
131 statistics.recordListenerEvent(ListenerEventType.INFORM_REGISTRATION_STATUS);
132 delegate.informRegistrationStatus(client, objectId, regState);
138 public void reissueRegistrations(final InvalidationClient client, final byte[] prefix,
139 final int prefixLen) {
140 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
141 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.reissueRegs") {
144 statistics.recordListenerEvent(ListenerEventType.REISSUE_REGISTRATIONS);
145 delegate.reissueRegistrations(client, prefix, prefixLen);
151 public void informError(final InvalidationClient client, final ErrorInfo errorInfo) {
152 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
153 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.informError") {
156 statistics.recordListenerEvent(ListenerEventType.INFORM_ERROR);
157 delegate.informError(client, errorInfo);
162 /** Returns the delegate {@link InvalidationListener}. */
163 InvalidationListener getDelegate() {
168 public void ready(final InvalidationClient client) {
169 Preconditions.checkState(internalScheduler.isRunningOnThread(), "Not on internal thread");
170 listenerScheduler.schedule(NO_DELAY, new NamedRunnable("CheckingInvalListener.ready") {
173 logger.info("Informing app that ticl is ready");
174 delegate.ready(client);