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package com.orbekk.same.android;
import java.util.ArrayList;
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.SameService;
import com.orbekk.same.State;
import com.orbekk.same.State.Component;
import com.orbekk.same.StateChangedListener;
import com.orbekk.same.UpdateConflict;
import com.orbekk.same.VariableFactory;
public class ClientInterfaceBridge implements ClientInterface {
private State state;
private ArrayList<StateChangedListener> listeners =
new ArrayList<StateChangedListener>();
class ResponseHandler extends Handler {
@Override public void handleMessage(Message message) {
if (serviceMessenger == null) {
logger.warn("Ignoring message to disabled ResponseHandler.");
return;
}
switch (message.what) {
case SameService.UPDATED_STATE_MESSAGE:
State.Component component = (State.Component)message.obj;
updateState(component);
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) {
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();
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
serviceMessenger = null;
}
};
private void updateState(State.Component component) {
state.update(component.getName(), component.getData(),
component.getRevision());
for (StateChangedListener listener : listeners) {
listener.stateChanged(component);
}
}
public ClientInterfaceBridge(Context context) {
this.context = context;
}
public 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 void disconnect() {
if (serviceMessenger != null) {
disconnectFromService();
context.unbindService(serviceConnection);
state = null;
}
}
@Override
public State getState() {
return new State(state);
}
@Override
public void set(String name, String data, long revision) throws UpdateConflict {
set(new Component(name, revision, data));
}
@Override
public void set(Component component) throws UpdateConflict {
Message message = Message.obtain(null, SameService.SET_STATE);
message.obj = component;
if (serviceMessenger == null) {
logger.warn("Not connected to service. Ignore update: {}", component);
return;
}
try {
serviceMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
throw new UpdateConflict(e.getMessage());
}
}
@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);
}
}
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