1 files changed, 122 insertions, 0 deletions
diff --git a/core/java/android/os/ServiceManager.java b/core/java/android/os/ServiceManager.java
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+++ b/core/java/android/os/ServiceManager.java
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+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * 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 android.os;
+
+import com.android.internal.os.BinderInternal;
+
+import android.util.Log;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/** @hide */
+public final class ServiceManager {
+    private static final String TAG = "ServiceManager";
+
+    private static IServiceManager sServiceManager;
+    private static HashMap<String, IBinder> sCache = new HashMap<String, IBinder>();
+
+    private static IServiceManager getIServiceManager() {
+        if (sServiceManager != null) {
+            return sServiceManager;
+        }
+
+        // Find the service manager
+        sServiceManager = ServiceManagerNative.asInterface(BinderInternal.getContextObject());
+        return sServiceManager;
+    }
+
+    /**
+     * Returns a reference to a service with the given name.
+     * 
+     * @param name the name of the service to get
+     * @return a reference to the service, or <code>null</code> if the service doesn't exist
+     */
+    public static IBinder getService(String name) {
+        try {
+            IBinder service = sCache.get(name);
+            if (service != null) {
+                return service;
+            } else {
+                return getIServiceManager().getService(name);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "error in getService", e);
+        }
+        return null;
+    }
+
+    /**
+     * Place a new @a service called @a name into the service
+     * manager.
+     * 
+     * @param name the name of the new service
+     * @param service the service object
+     */
+    public static void addService(String name, IBinder service) {
+        try {
+            getIServiceManager().addService(name, service);
+        } catch (RemoteException e) {
+            Log.e(TAG, "error in addService", e);
+        }
+    }
+    
+    /**
+     * Retrieve an existing service called @a name from the
+     * service manager.  Non-blocking.
+     */
+    public static IBinder checkService(String name) {
+        try {
+            IBinder service = sCache.get(name);
+            if (service != null) {
+                return service;
+            } else {
+                return getIServiceManager().checkService(name);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "error in checkService", e);
+            return null;
+        }
+    }
+
+    /**
+     * Return a list of all currently running services.
+     */
+    public static String[] listServices() throws RemoteException {
+        try {
+            return getIServiceManager().listServices();
+        } catch (RemoteException e) {
+            Log.e(TAG, "error in listServices", e);
+            return null;
+        }
+    }
+
+    /**
+     * This is only intended to be called when the process is first being brought
+     * up and bound by the activity manager. There is only one thread in the process
+     * at that time, so no locking is done.
+     * 
+     * @param cache the cache of service references
+     * @hide
+     */
+    public static void initServiceCache(Map<String, IBinder> cache) {
+        if (sCache.size() != 0 && Process.supportsProcesses()) {
+            throw new IllegalStateException("setServiceCache may only be called once");
+        }
+        sCache.putAll(cache);
+    }
+}