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package com.orbekk.same.android;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import com.orbekk.same.ClientInterface;
import com.orbekk.same.ConnectionState;
import com.orbekk.same.State;
import com.orbekk.same.State.Component;
import com.orbekk.same.StateChangedListener;
import com.orbekk.same.VariableFactory;
import com.orbekk.util.DelayedOperation;
public class ClientInterfaceBridge implements ClientInterface {
private State state;
private ArrayList<StateChangedListener> listeners =
new ArrayList<StateChangedListener>();
private Map<Integer, DelayedOperation> ongoingOperations =
new HashMap<Integer, DelayedOperation>();
/** This is used to queue operations until connected to the service. */
private ArrayList<Message> pendingOperations = new ArrayList<Message>();
private int nextOperationNumber = 0;
class ResponseHandler extends Handler {
@Override public synchronized void handleMessage(Message message) {
if (serviceMessenger == null) {
logger.warn("Ignoring message to disabled ResponseHandler.");
return;
}
switch (message.what) {
case SameService.UPDATED_STATE_CALLBACK:
State.Component component =
new ComponentBundle(message.getData()).getComponent();
updateState(component);
break;
case SameService.OPERATION_STATUS_CALLBACK:
int operationNumber = message.arg1;
logger.info("Received callback for operation {}", operationNumber);
int statusCode = message.getData().getInt("statusCode");
String statusMessage = message.getData().getString("statusMessage");
DelayedOperation.Status status =
new DelayedOperation.Status(statusCode, statusMessage);
completeOperation(operationNumber, status);
break;
default:
logger.warn("Received unknown message from service: {}",
message);
}
}
}
private Logger logger = LoggerFactory.getLogger(getClass());
private Messenger serviceMessenger = null;
private Messenger responseMessenger = new Messenger(new ResponseHandler());
private Context context;
private ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
synchronized (ClientInterfaceBridge.this) {
serviceMessenger = new Messenger(service);
Message message = Message.obtain(null,
SameService.ADD_STATE_RECEIVER);
message.replyTo = responseMessenger;
try {
serviceMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
}
sendPendingOperations();
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
serviceMessenger = null;
}
};
private void updateState(State.Component component) {
state.forceUpdate(component.getName(), component.getData(),
component.getRevision());
for (StateChangedListener listener : listeners) {
listener.stateChanged(component);
}
}
private synchronized DelayedOperation createOperation() {
DelayedOperation op = new DelayedOperation();
op.setIdentifier(nextOperationNumber);
nextOperationNumber += 1;
ongoingOperations.put(op.getIdentifier(), op);
return op;
}
private synchronized void completeOperation(int operationNumber,
DelayedOperation.Status status) {
DelayedOperation op = ongoingOperations.remove(operationNumber);
if (op != null) {
op.complete(status);
}
}
public ClientInterfaceBridge(Context context) {
this.context = context;
}
public synchronized void connect() {
state = new State(".Temporary");
Intent intent = new Intent(context, SameService.class);
context.bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
}
private void disconnectFromService() {
Message message = Message.obtain(null, SameService.REMOVE_STATE_RECEIVER);
message.obj = responseMessenger;
try {
serviceMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
}
}
public synchronized void disconnect() {
if (serviceMessenger != null) {
disconnectFromService();
}
if (serviceConnection != null) {
context.unbindService(serviceConnection);
}
}
@Override
public State getState() {
return new State(state);
}
@Override
public synchronized DelayedOperation set(Component component) {
DelayedOperation op = createOperation();
Message message = Message.obtain(null, SameService.SET_STATE);
message.arg1 = op.getIdentifier();
message.setData(new ComponentBundle(component).getBundle());
message.replyTo = responseMessenger;
pendingOperations.add(message);
sendPendingOperations();
return op;
}
private synchronized void sendPendingOperations() {
if (serviceMessenger == null) {
logger.warn("Not connected to service. Delaying operations {}",
pendingOperations);
return;
}
for (Message message : pendingOperations) {
try {
serviceMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
completeOperation(message.arg1,
DelayedOperation.Status.createError(
"Error contacting service: " + e.getMessage()));
}
}
pendingOperations.clear();
}
@Override
public void addStateListener(StateChangedListener listener) {
listeners.add(listener);
}
@Override
public void removeStateListener(StateChangedListener listener) {
listeners.remove(listener);
}
public VariableFactory createVariableFactory() {
return VariableFactory.create(this);
}
/** Doesn't work yet. Maybe we needs a listener interface? */
@Override
public ConnectionState getConnectionState() {
return null;
}
}
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