1 files changed, 88 insertions, 0 deletions
diff --git a/comm/src/com/android/managedprovisioning/comm/ChannelHandler.java b/comm/src/com/android/managedprovisioning/comm/ChannelHandler.java
new file mode 100644
index 00000000..fa6c41df
--- /dev/null
+++ b/comm/src/com/android/managedprovisioning/comm/ChannelHandler.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2015 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 com.android.managedprovisioning.comm;
+
+import com.android.managedprovisioning.comm.Bluetooth.CommPacket;
+
+import java.io.IOException;
+
+/**
+ * A Handler is a reader thread that will loop over a thread reading
+ * messages and calling a handle function.  It is designed to remove
+ * the repetitive looping nature from other classes.
+ */
+public abstract class ChannelHandler extends Thread {
+
+    private static final int MAX_IO_EXCEPTIONS = 10;
+
+    protected Channel mChannel;
+    private boolean mIsRunning;
+
+    public ChannelHandler(Channel socket) {
+        mChannel = socket;
+        mIsRunning = true;
+    }
+
+    @Override
+    public void run() {
+        int exceptionCount = 0;
+        try {
+            startConnection();
+            while (mIsRunning && mChannel.isConnected()
+                    && exceptionCount < MAX_IO_EXCEPTIONS) {
+                try {
+                    CommPacket packet = mChannel.read();
+                    handleRequest(packet);
+                } catch (IOException ioe) {
+                    ProvisionCommLogger.logd(ioe);
+                    exceptionCount++;
+                }
+            }
+        // Catch everything for graceful close.
+        } catch (Exception e) {
+            ProvisionCommLogger.loge(e);
+        } finally {
+            stopConnection();
+        }
+        if (mChannel != null) {
+            mChannel.close();
+        }
+    }
+
+    public void stopHandler() {
+        mIsRunning = false;
+    }
+
+    /**
+     * Action to take when starting connection.
+     * @throws IOException if there is an issue that should prevent the connection from starting
+     */
+    protected abstract void startConnection() throws IOException;
+
+    /**
+     * Action to take when shutting down the connection.
+     */
+    protected abstract void stopConnection();
+
+    /**
+     * Handle data sent over the communication channel.
+     * @param packet communication packet received
+     * @throws IOException if the packet could not be processed
+     */
+    protected abstract void handleRequest(CommPacket packet) throws IOException;
+
+}