123 lines
3.7 KiB
Java
123 lines
3.7 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.os;
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import com.android.internal.os.BinderInternal;
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import android.util.Log;
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import java.util.HashMap;
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import java.util.Map;
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/** @hide */
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public final class ServiceManager {
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private static final String TAG = "ServiceManager";
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private static IServiceManager sServiceManager;
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private static HashMap<String, IBinder> sCache = new HashMap<String, IBinder>();
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private static IServiceManager getIServiceManager() {
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if (sServiceManager != null) {
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return sServiceManager;
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}
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// Find the service manager
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sServiceManager = ServiceManagerNative.asInterface(BinderInternal.getContextObject());
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return sServiceManager;
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}
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/**
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* Returns a reference to a service with the given name.
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*
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* @param name the name of the service to get
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* @return a reference to the service, or <code>null</code> if the service doesn't exist
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*/
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public static IBinder getService(String name) {
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try {
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IBinder service = sCache.get(name);
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if (service != null) {
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return service;
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} else {
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return getIServiceManager().getService(name);
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}
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} catch (RemoteException e) {
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Log.e(TAG, "error in getService", e);
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}
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return null;
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}
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/**
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* Place a new @a service called @a name into the service
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* manager.
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*
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* @param name the name of the new service
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* @param service the service object
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*/
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public static void addService(String name, IBinder service) {
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try {
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getIServiceManager().addService(name, service);
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} catch (RemoteException e) {
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Log.e(TAG, "error in addService", e);
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}
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}
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/**
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* Retrieve an existing service called @a name from the
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* service manager. Non-blocking.
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*/
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public static IBinder checkService(String name) {
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try {
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IBinder service = sCache.get(name);
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if (service != null) {
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return service;
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} else {
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return getIServiceManager().checkService(name);
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}
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} catch (RemoteException e) {
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Log.e(TAG, "error in checkService", e);
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return null;
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}
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}
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/**
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* Return a list of all currently running services.
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*/
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public static String[] listServices() throws RemoteException {
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try {
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return getIServiceManager().listServices();
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} catch (RemoteException e) {
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Log.e(TAG, "error in listServices", e);
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return null;
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}
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}
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/**
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* This is only intended to be called when the process is first being brought
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* up and bound by the activity manager. There is only one thread in the process
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* at that time, so no locking is done.
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*
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* @param cache the cache of service references
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* @hide
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*/
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public static void initServiceCache(Map<String, IBinder> cache) {
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if (sCache.size() != 0 && Process.supportsProcesses()) {
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throw new IllegalStateException("setServiceCache may only be called once");
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}
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sCache.putAll(cache);
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}
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}
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