001: /*
002: *
003: * Copyright (c) 2007, Sun Microsystems, Inc.
004: *
005: * All rights reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * * Redistributions of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: * * Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in the
015: * documentation and/or other materials provided with the distribution.
016: * * Neither the name of Sun Microsystems nor the names of its contributors
017: * may be used to endorse or promote products derived from this software
018: * without specific prior written permission.
019: *
020: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
021: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
022: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
023: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
024: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
025: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
026: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
027: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
028: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
029: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
030: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
031: */
032: package socket;
033:
034: import java.io.*;
035:
036: import javax.microedition.io.*;
037: import javax.microedition.lcdui.*;
038: import javax.microedition.midlet.*;
039:
040: public class Client implements Runnable, CommandListener {
041: private SocketMIDlet parent;
042: private Display display;
043: private Form f;
044: private StringItem si;
045: private TextField tf;
046: private boolean stop;
047: private Command sendCommand = new Command("Send", Command.ITEM, 1);
048: private Command exitCommand = new Command("Exit", Command.EXIT, 1);
049: InputStream is;
050: OutputStream os;
051: SocketConnection sc;
052: Sender sender;
053:
054: public Client(SocketMIDlet m) {
055: parent = m;
056: display = Display.getDisplay(parent);
057: f = new Form("Socket Client");
058: si = new StringItem("Status:", " ");
059: tf = new TextField("Send:", "", 30, TextField.ANY);
060: f.append(si);
061: f.append(tf);
062: f.addCommand(exitCommand);
063: f.addCommand(sendCommand);
064: f.setCommandListener(this );
065: display.setCurrent(f);
066: }
067:
068: /**
069: * Start the client thread
070: */
071: public void start() {
072: Thread t = new Thread(this );
073: t.start();
074: }
075:
076: public void run() {
077: try {
078: sc = (SocketConnection) Connector
079: .open("socket://localhost:5000");
080: si.setText("Connected to server");
081: is = sc.openInputStream();
082: os = sc.openOutputStream();
083:
084: // Start the thread for sending messages - see Sender's main
085: // comment for explanation
086: sender = new Sender(os);
087:
088: // Loop forever, receiving data
089: while (true) {
090: StringBuffer sb = new StringBuffer();
091: int c = 0;
092:
093: while (((c = is.read()) != '\n') && (c != -1)) {
094: sb.append((char) c);
095: }
096:
097: if (c == -1) {
098: break;
099: }
100:
101: // Display message to user
102: si.setText("Message received - " + sb.toString());
103: }
104:
105: stop();
106: si.setText("Connection closed");
107: f.removeCommand(sendCommand);
108: } catch (ConnectionNotFoundException cnfe) {
109: Alert a = new Alert("Client",
110: "Please run Server MIDlet first", null,
111: AlertType.ERROR);
112: a.setTimeout(Alert.FOREVER);
113: a.setCommandListener(this );
114: display.setCurrent(a);
115: } catch (IOException ioe) {
116: if (!stop) {
117: ioe.printStackTrace();
118: }
119: } catch (Exception e) {
120: e.printStackTrace();
121: }
122: }
123:
124: public void commandAction(Command c, Displayable s) {
125: if ((c == sendCommand) && !parent.isPaused()) {
126: sender.send(tf.getString());
127: }
128:
129: if ((c == Alert.DISMISS_COMMAND) || (c == exitCommand)) {
130: parent.notifyDestroyed();
131: parent.destroyApp(true);
132: }
133: }
134:
135: /**
136: * Close all open streams
137: */
138: public void stop() {
139: try {
140: stop = true;
141:
142: if (sender != null) {
143: sender.stop();
144: }
145:
146: if (is != null) {
147: is.close();
148: }
149:
150: if (os != null) {
151: os.close();
152: }
153:
154: if (sc != null) {
155: sc.close();
156: }
157: } catch (IOException ioe) {
158: }
159: }
160: }
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