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Java interface using the shell to collect and visualize sensor values from Sky nodes

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nifi 2008-07-09 23:18:05 +00:00
parent 5da504dcc7
commit 0fa1ae0fce
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examples/sky-shell/src/se/sics/contiki/collect/SerialConnection.java Normal file
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/*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: SerialConnection.java,v 1.1 2008/07/09 23:18:06 nifi Exp $
*
* -----------------------------------------------------------------
*
* SerialConnection
*
* Authors : Joakim Eriksson, Niclas Finne
* Created : 5 jul 2008
* Updated : $Date: 2008/07/09 23:18:06 $
* $Revision: 1.1 $
*/
package se.sics.contiki.collect;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
/**
*
*/
public abstract class SerialConnection {
public static final String SERIALDUMP_WINDOWS = "./tools/serialdump-windows.exe";
public static final String SERIALDUMP_LINUX = "./tools/serialdump-linux";
private String comPort;
private Process serialDumpProcess;
private PrintWriter serialOutput;
private boolean isRunning;
private boolean isOpen;
private String lastError;
public boolean isOpen() {
return isOpen;
}
public String getComPort() {
return comPort;
}
public String getLastError() {
return lastError;
}
public void open(String comPort) {
close();
this.comPort = comPort;
/* Connect to COM using external serialdump application */
String osName = System.getProperty("os.name").toLowerCase();
String fullCommand;
if (osName.startsWith("win")) {
fullCommand = SERIALDUMP_WINDOWS + " " + "-b115200" + " " + getMappedComPortForWindows(comPort);
} else {
fullCommand = SERIALDUMP_LINUX + " " + "-b115200" + " " + comPort;
}
isRunning = true;
try {
String[] cmd = fullCommand.split(" ");
serialDumpProcess = Runtime.getRuntime().exec(cmd);
final BufferedReader input = new BufferedReader(new InputStreamReader(serialDumpProcess.getInputStream()));
final BufferedReader err = new BufferedReader(new InputStreamReader(serialDumpProcess.getErrorStream()));
serialOutput = new PrintWriter(new OutputStreamWriter(serialDumpProcess.getOutputStream()));
/* Start thread listening on stdout */
Thread readInput = new Thread(new Runnable() {
public void run() {
String line;
try {
while ((line = input.readLine()) != null) {
serialData(line);
}
input.close();
System.out.println("Serialdump process terminated.");
closeConnection();
} catch (IOException e) {
lastError = "Error when reading from serialdump process: " + e;
System.err.println(lastError);
e.printStackTrace();
closeConnection();
}
}
}, "read input stream thread");
/* Start thread listening on stderr */
Thread readError = new Thread(new Runnable() {
public void run() {
String line;
try {
while ((line = err.readLine()) != null) {
if (!isOpen && line.startsWith("connecting") && line.endsWith("[OK]")) {
isOpen = true;
serialOpened();
} else {
System.err.println("Serialdump error stream> " + line);
}
}
err.close();
} catch (IOException e) {
System.err.println("Error when reading from serialdump process: " + e);
e.printStackTrace();
}
}
}, "read error stream thread");
readInput.start();
readError.start();
} catch (Exception e) {
lastError = "Failed to execute '" + fullCommand + "': " + e;
System.err.println(lastError);
e.printStackTrace();
closeConnection();
}
}
private String getMappedComPortForWindows(String comPort) {
if (comPort.startsWith("COM")) {
comPort = "/dev/com" + comPort.substring(3);
}
return comPort;
}
public void writeSerialData(String data) {
PrintWriter serialOutput = this.serialOutput;
if (serialOutput != null) {
serialOutput.println(data);
serialOutput.flush();
}
}
public void close() {
isOpen = false;
isRunning = false;
lastError = null;
closeConnection();
}
protected void closeConnection() {
if (serialOutput != null) {
serialOutput.close();
serialOutput = null;
}
if (serialDumpProcess != null) {
serialDumpProcess.destroy();
serialDumpProcess = null;
}
if (isRunning) {
isRunning = false;
serialClosed();
}
}
protected abstract void serialData(String line);
protected abstract void serialOpened();
protected abstract void serialClosed();
}