LogCatSensor.java

package interdroid.swan.sensors.impl;

import interdroid.swan.R;
import interdroid.swan.sensors.AbstractConfigurationActivity;
import interdroid.swan.sensors.AbstractSwanSensor;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

import android.os.Bundle;
import android.util.Log;

public class LogCatSensor extends AbstractSwanSensor {

	private static final String TAG = "LogCat Sensor";
	
	/**
	 * The configuration activity for this sensor.
	 * 
	 * @author nick <palmer@cs.vu.nl>
	 * 
	 */
	public static class ConfigurationActivity extends
			AbstractConfigurationActivity {

		@Override
		public int getPreferencesXML() {
			return R.xml.logcat_preferences;
		}

	}

	public static final String LOG_FIELD = "log";

	public static final String LOGCAT_PARAMETERS = "logcat_parameters";

	public static final String DEFAULT_LOGCAT_PARAMETERS = "*:I";

	private Map<String, LogcatPoller> activeThreads = new HashMap<String, LogcatPoller>();

	@Override
	public String[] getValuePaths() {
		return new String[] { LOG_FIELD };
	}

	@Override
	public void initDefaultConfiguration(Bundle DEFAULT_CONFIGURATION) {
		DEFAULT_CONFIGURATION.putString(LOGCAT_PARAMETERS,
				DEFAULT_LOGCAT_PARAMETERS);
	}

	@Override
	public void onConnected() {
		SENSOR_NAME = "LogCat Sensor";
	}

	@Override
	public final void register(String id, String valuePath, Bundle configuration) {
		Log.d(TAG, "Logcat got registration for: " + id + ", conf: "
				+ configuration.getString(LOGCAT_PARAMETERS));
		LogcatPoller logcatPoller = new LogcatPoller(id, valuePath,
				configuration);
		activeThreads.put(id, logcatPoller);
		logcatPoller.start();
	}

	@Override
	public final void unregister(String id) {
		activeThreads.remove(id).terminate();
	}

	class LogcatPoller extends Thread {

		private String id;
		private Bundle configuration;
		private String valuePath;
		private Process process;

		LogcatPoller(String id, String valuePath, Bundle configuration) {
			this.id = id;
			this.configuration = configuration;
			this.valuePath = valuePath;
		}

		public void terminate() {
			process.destroy();
		}

		public void run() {
			new Thread() {
				public void run() {
					String parameters = configuration
							.getString(LOGCAT_PARAMETERS);
					if (parameters == null) {
						parameters = mDefaultConfiguration
								.getString(LOGCAT_PARAMETERS);
					}
					try {
						process = Runtime
								.getRuntime()
								.exec(new String[] { "/system/bin/sh", "-c",
										"/system/bin/logcat -s " + parameters });
						BufferedReader reader = new BufferedReader(
								new InputStreamReader(process.getInputStream()));
						String line = null;
						while ((line = reader.readLine()) != null) {
							System.out.println("line: " + line);
							long now = System.currentTimeMillis();
							putValueTrimSize(valuePath, id, now, line);
						}
						reader.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}.start();

		}

	}

	@Override
	public void onDestroySensor() {
		for (LogcatPoller logcatPoller : activeThreads.values()) {
			logcatPoller.terminate();
		}
		super.onDestroySensor();
	};

}