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Shrink code in the ConnectionHandlers

This commit is contained in:
Andrin Fassbind 2022-04-15 16:25:45 +02:00 committed by Leonardo Brandenberger
parent 46b0e4386a
commit 5022974427
3 changed files with 105 additions and 145 deletions
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120
client/src/main/java/ch/zhaw/pm2/multichat/client/ClientConnectionHandler.java
View File

@ -13,20 +13,19 @@ import java.net.SocketException;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import static ch.zhaw.pm2.multichat.protocol.ConnectionHandler.State.*;
public class ClientConnectionHandler extends ConnectionHandler implements Runnable {
private final Pattern messagePattern = Pattern.compile("^(?:@(\\S*))?\\s*(.*)$");
private final Pattern messagePattern = Pattern.compile( "^(?:@(\\S*))?\\s*(.*)$" );
private SimpleStringProperty userName;
private final SimpleObjectProperty<State> state;
private final ClientMessageList messages;
private final SimpleStringProperty serverAddress;
private final SimpleIntegerProperty serverPort;
private SimpleObjectProperty<State> state;
private ClientMessageList messages;
private SimpleStringProperty serverAddress;
private SimpleIntegerProperty serverPort;
public ClientConnectionHandler(ClientMessageList messages) {
public ClientConnectionHandler(ClientMessageList messages) {
super();
this.messages = messages;
state = new SimpleObjectProperty<>(State.NEW);
@ -40,30 +39,24 @@ public class ClientConnectionHandler extends ConnectionHandler implements Runnab
this.serverAddress.set(serverAddress);
this.serverPort.set(serverPort);
setConnection(NetworkHandler.openConnection(serverAddress, serverPort));
this.userName = new SimpleStringProperty((userName == null || userName.isBlank()) ? USER_NONE : userName);
this.userName = new SimpleStringProperty((userName == null || userName.isBlank())? USER_NONE : userName);
}
public SimpleStringProperty getServerAddressProperty() {
return serverAddress;
}
public SimpleStringProperty getServerAddressProperty() { return serverAddress; }
public SimpleIntegerProperty getServerPortProperty() {
return serverPort;
}
public SimpleIntegerProperty getServerPortProperty() { return serverPort; }
public SimpleObjectProperty<State> getStateProperty() {
return this.state;
}
public SimpleStringProperty getUserNameProperty() {
return userName;
}
public SimpleStringProperty getUserNameProperty() { return userName; }
public void setState(State newState) {
public void setState (State newState) {
state.set(newState);
}
public void run() {
public void run () {
startReceiving();
}
@ -84,9 +77,9 @@ public class ClientConnectionHandler extends ConnectionHandler implements Runnab
System.out.println("Connection terminated by remote");
this.setState(DISCONNECTED);
System.err.println("Unregistered because connection terminated" + e.getMessage());
} catch (IOException e) {
} catch(IOException e) {
System.err.println("Communication error" + e);
} catch (ClassNotFoundException e) {
} catch(ClassNotFoundException e) {
System.err.println("Received object of unknown type" + e.getMessage());
}
System.out.println("Stopped Connection Handler");
@ -106,65 +99,48 @@ public class ClientConnectionHandler extends ConnectionHandler implements Runnab
private void processData(String data) {
try {
// parse data content
Scanner scanner = new Scanner(data);
String sender = null;
String reciever = null;
String type = null;
String payload = null;
if (scanner.hasNextLine()) {
sender = scanner.nextLine();
} else {
throw new ChatProtocolException("No Sender found");
}
if (scanner.hasNextLine()) {
reciever = scanner.nextLine();
} else {
throw new ChatProtocolException("No Reciever found");
}
if (scanner.hasNextLine()) {
type = scanner.nextLine();
} else {
throw new ChatProtocolException("No Type found");
}
if (scanner.hasNextLine()) {
payload = scanner.nextLine();
}
StringBuilder sender = new StringBuilder();
StringBuilder reciever = new StringBuilder();
StringBuilder type = new StringBuilder();
StringBuilder payload = new StringBuilder();
super.processData(scanner,sender,reciever,type,payload);
// dispatch operation based on type parameter
if (type.equals(getDataTypeConnect())) {
if (type.toString().equals(getDataTypeConnect())) {
System.err.println("Illegal connect request from server");
} else if (type.equals(getDataTypeConfirm())) {
} else if (type.toString().equals(getDataTypeConfirm())) {
if (state.get() == CONFIRM_CONNECT) {
this.userName.set(reciever);
this.userName.set(reciever.toString());
this.serverPort.set(getConnection().getRemotePort());
this.serverAddress.set(getConnection().getRemoteHost());
messages.addMessage(new Message(Message.MessageType.INFO, sender, reciever, payload));
messages.addMessage(new Message(Message.MessageType.INFO,sender.toString(),reciever.toString(),payload.toString()));
System.out.println("CONFIRM: " + payload);
this.setState(CONNECTED);
} else if (state.get() == CONFIRM_DISCONNECT) {
messages.addMessage(new Message(Message.MessageType.INFO, sender, reciever, payload));
messages.addMessage(new Message(Message.MessageType.INFO,sender.toString(),reciever.toString(),payload.toString()));
System.out.println("CONFIRM: " + payload);
this.setState(DISCONNECTED);
} else {
System.err.println("Got unexpected confirm message: " + payload);
}
} else if (type.equals(getDataTypeDisconnect())) {
} else if (type.toString().equals(getDataTypeDisconnect())) {
if (state.get() == DISCONNECTED) {
System.out.println("DISCONNECT: Already in disconnected: " + payload);
return;
}
messages.addMessage(new Message(Message.MessageType.INFO, sender, reciever, payload));
messages.addMessage(new Message(Message.MessageType.INFO,sender.toString(),reciever.toString(),payload.toString()));
System.out.println("DISCONNECT: " + payload);
this.setState(DISCONNECTED);
} else if (type.equals(getDataTypeMessage())) {
} else if (type.toString().equals(getDataTypeMessage())) {
if (state.get() != CONNECTED) {
System.out.println("MESSAGE: Illegal state " + state + " for message: " + payload);
return;
}
messages.addMessage(new Message(Message.MessageType.MESSAGE, sender, reciever, payload));
System.out.println("MESSAGE: From " + sender + " to " + reciever + ": " + payload);
} else if (type.equals(getDataTypeError())) {
messages.addMessage(new Message(Message.MessageType.ERROR, sender, reciever, payload));
messages.addMessage(new Message(Message.MessageType.MESSAGE,sender.toString(),reciever.toString(),payload.toString()));
System.out.println("MESSAGE: From " + sender + " to " + reciever + ": "+ payload);
} else if (type.toString().equals(getDataTypeError())) {
messages.addMessage(new Message(Message.MessageType.ERROR,sender.toString(),reciever.toString(),payload.toString()));
System.out.println("ERROR: " + payload);
} else {
System.out.println("Unknown data type received: " + type);
@ -175,37 +151,16 @@ public class ClientConnectionHandler extends ConnectionHandler implements Runnab
}
}
private void sendData(String sender, String receiver, String type, String payload) {
if (getConnection().isAvailable()) {
new StringBuilder();
String data = new StringBuilder()
.append(sender + "\n")
.append(receiver + "\n")
.append(type + "\n")
.append(payload + "\n")
.toString();
try {
getConnection().send(data);
} catch (SocketException e) {
System.err.println("Connection closed: " + e.getMessage());
} catch (EOFException e) {
System.out.println("Connection terminated by remote");
} catch (IOException e) {
System.err.println("Communication error: " + e.getMessage());
}
}
}
public void connect() throws ChatProtocolException {
if (state.get() != NEW) throw new ChatProtocolException("Illegal state for connect: " + state);
this.sendData(userName.get(), USER_NONE, getDataTypeConnect(), null);
this.sendData(userName.get(), USER_NONE, getDataTypeConnect(),null);
this.setState(CONFIRM_CONNECT);
}
public void disconnect() throws ChatProtocolException {
if (state.get() != NEW && state.get() != CONNECTED)
throw new ChatProtocolException("Illegal state for disconnect: " + state);
this.sendData(userName.get(), USER_NONE, getDataTypeDisconnect(), null);
if (state.get() != NEW && state.get() != CONNECTED) throw new ChatProtocolException("Illegal state for disconnect: " + state);
this.sendData(userName.get(), USER_NONE, getDataTypeDisconnect(),null);
this.setState(CONFIRM_DISCONNECT);
}
@ -216,15 +171,14 @@ public class ClientConnectionHandler extends ConnectionHandler implements Runnab
if (matcher.find()) {
String receiver = matcher.group(1);
String message = matcher.group(2);
if (message.length() < 1) {
if(message.length() < 1){
return false;
}
if (receiver == null || receiver.isBlank()) receiver = ClientConnectionHandler.USER_ALL;
this.sendData(userName.get(), receiver, getDataTypeMessage(), message);
this.sendData(userName.get(), receiver, getDataTypeMessage(),message);
return true;
} else {
return false;
}
}
}

48
protocol/src/main/java/ch/zhaw/pm2/multichat/protocol/ConnectionHandler.java
View File

@ -1,5 +1,10 @@
package ch.zhaw.pm2.multichat.protocol;
import java.io.EOFException;
import java.io.IOException;
import java.net.SocketException;
import java.util.Scanner;
public abstract class ConnectionHandler {
private NetworkHandler.NetworkConnection<String> connection;
@ -44,4 +49,47 @@ public abstract class ConnectionHandler {
protected void setConnection(NetworkHandler.NetworkConnection<String> connection) {
this.connection = connection;
}
protected void processData(Scanner scanner, StringBuilder sender, StringBuilder reciever, StringBuilder type, StringBuilder payload) throws ChatProtocolException {
// parse data content
if (scanner.hasNextLine()) {
sender.append(scanner.nextLine());
} else {
throw new ChatProtocolException("No Sender found");
}
if (scanner.hasNextLine()) {
reciever.append(scanner.nextLine());
} else {
throw new ChatProtocolException("No Reciever found");
}
if (scanner.hasNextLine()) {
type.append(scanner.nextLine());
} else {
throw new ChatProtocolException("No Type found");
}
if (scanner.hasNextLine()) {
payload.append(scanner.nextLine());
}
}
protected void sendData(String sender, String receiver, String type, String payload) {
if (connection.isAvailable()) {
new StringBuilder();
String data = new StringBuilder()
.append(sender+"\n")
.append(receiver+"\n")
.append(type+"\n")
.append(payload+"\n")
.toString();
try {
getConnection().send(data);
} catch (SocketException e) {
System.err.println("Connection closed: " + e.getMessage());
} catch (EOFException e) {
System.out.println("Connection terminated by remote");
} catch(IOException e) {
System.err.println("Communication error: " + e.getMessage());
}
}
}
}

82
server/src/main/java/ch/zhaw/pm2/multichat/server/ServerConnectionHandler.java
View File

@ -8,7 +8,6 @@ import ch.zhaw.pm2.multichat.protocol.NetworkHandler;
import java.io.EOFException;
import java.io.IOException;
import java.net.SocketException;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Scanner;
@ -91,43 +90,25 @@ public class ServerConnectionHandler extends ConnectionHandler implements Runnab
getConnection().close();
System.out.println("Stopped receiving data.");
} catch (IOException e) {
System.err.println("Failed to close connection." + e);
System.err.println("Failed to close connection." + e.getMessage());
}
System.out.println("Closed Connection Handler for " + userName);
}
private void processData(String data) {
try {
// parse data content
Scanner scanner = new Scanner(data);
String sender = null;
String reciever = null;
String type = null;
String payload = null;
if (scanner.hasNextLine()) {
sender = scanner.nextLine();
} else {
throw new ChatProtocolException("No Sender found");
}
if (scanner.hasNextLine()) {
reciever = scanner.nextLine();
} else {
throw new ChatProtocolException("No Reciever found");
}
if (scanner.hasNextLine()) {
type = scanner.nextLine();
} else {
throw new ChatProtocolException("No Type found");
}
if (scanner.hasNextLine()) {
payload = scanner.nextLine();
}
StringBuilder sender = new StringBuilder();
StringBuilder reciever = new StringBuilder();
StringBuilder type = new StringBuilder();
StringBuilder payload = new StringBuilder();
super.processData(scanner,sender,reciever,type,payload);
// dispatch operation based on type parameter
if (type.equals(getDataTypeConnect())) {
if (type.toString().equals(getDataTypeConnect())) {
if (this.state != NEW) throw new ChatProtocolException("Illegal state for connect request: " + state);
if (sender == null || sender.isBlank()) sender = this.userName;
if (connectionRegistry.containsKey(sender)) {
if (sender.toString().isBlank()) sender.append(this.userName);
if (connectionRegistry.containsKey(sender.toString())) {
mutex.lock();
try {
state = ERROR;
@ -140,7 +121,7 @@ public class ServerConnectionHandler extends ConnectionHandler implements Runnab
}
mutex.lock();
try {
this.userName = sender;
this.userName = sender.toString();
nameComplete.signal();
}
finally {
@ -149,9 +130,9 @@ public class ServerConnectionHandler extends ConnectionHandler implements Runnab
connectionRegistry.put(userName, this);
sendData(USER_NONE, userName, getDataTypeConfirm(), "Registration successfull for " + userName);
this.state = CONNECTED;
} else if (type.equals(getDataTypeConfirm())) {
} else if (type.toString().equals(getDataTypeConfirm())) {
System.out.println("Not expecting to receive a CONFIRM request from client");
} else if (type.equals(getDataTypeDisconnect())) {
} else if (type.toString().equals(getDataTypeDisconnect())) {
if (state == DISCONNECTED)
throw new ChatProtocolException("Illegal state for disconnect request: " + state);
if (state == CONNECTED) {
@ -160,24 +141,24 @@ public class ServerConnectionHandler extends ConnectionHandler implements Runnab
sendData(USER_NONE, userName, getDataTypeConfirm(), "Confirm disconnect of " + userName);
this.state = DISCONNECTED;
this.stopReceiving();
} else if (type.equals(getDataTypeMessage())) {
} else if (type.toString().equals(getDataTypeMessage())) {
if (state != CONNECTED) throw new ChatProtocolException("Illegal state for message request: " + state);
if (USER_ALL.equals(reciever)) {
if (USER_ALL.equals(reciever.toString())) {
for (ServerConnectionHandler handler : connectionRegistry.values()) {
handler.sendData(sender, reciever, type, payload);
handler.sendData(sender.toString(), reciever.toString(), type.toString(), payload.toString());
}
} else {
ServerConnectionHandler handler = connectionRegistry.get(reciever);
ServerConnectionHandler handler = connectionRegistry.get(reciever.toString());
if (handler != null) {
handler.sendData(sender, reciever, type, payload);
if(!reciever.equals(sender)){
sendData(sender, reciever, type, payload); //send message to sender if it's a direct message and sender is not receiver.
handler.sendData(sender.toString(), reciever.toString(), type.toString(), payload.toString());
if(!reciever.toString().equals(sender.toString())){
sendData(sender.toString(), reciever.toString(), type.toString(), payload.toString()); //send message to sender if it's a direct message and sender is not receiver.
}
} else {
this.sendData(USER_NONE, userName, getDataTypeError(), "Unknown User: " + reciever);
}
}
} else if (type.equals(getDataTypeError())) {
} else if (type.toString().equals(getDataTypeError())) {
System.err.println("Received error from client (" + sender + "): " + payload);
} else {
System.err.println("Unknown data type received: " + type);
@ -188,27 +169,4 @@ public class ServerConnectionHandler extends ConnectionHandler implements Runnab
sendData(USER_NONE, userName, getDataTypeError(), e.getMessage());
}
}
private void sendData(String sender, String receiver, String type, String payload) {
if (getConnection().isAvailable()) {
new StringBuilder();
String data = new StringBuilder()
.append(sender+"\n")
.append(receiver+"\n")
.append(type+"\n")
.append(payload+"\n")
.toString();
try {
getConnection().send(data);
} catch (SocketException e) {
System.out.println("Connection closed: " + e.getMessage());
} catch (EOFException e) {
System.out.println("Connection terminated by remote");
} catch(IOException e) {
System.out.println("Communication error: " + e.getMessage());
}
}
}
}