zdm/envoy
zdm
/
envoy
Archived
3
Fork 0
Code Issues 22 Pull Requests Releases 1 Wiki Activity

Merge pull request #10 from informatik-ag-ngl/f/message_processing 

Implemented the processing of messages sent by clients
This commit is contained in:
Kai S. K. Engelbart 2020-01-15 06:38:22 +01:00 committed by GitHub
parent ef68f8b3d2 dc6199806f
commit d396572d18
23 changed files with 537 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
.classpath
View File

@ -6,11 +6,6 @@
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="src" output="target/test-classes" path="src/test/java">
<attributes>
<attribute name="optional" value="true"/>
@ -18,12 +13,6 @@
<attribute name="test" value="true"/>
</attributes>
</classpathentry>
<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources">
<attributes>
<attribute name="maven.pomderived" value="true"/>
<attribute name="test" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
<attributes>
<attribute name="maven.pomderived" value="true"/>
@ -35,5 +24,16 @@
</attributes>
</classpathentry>
<classpathentry kind="src" path="/envoy-common"/>
<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources">
<attributes>
<attribute name="maven.pomderived" value="true"/>
</attributes>
</classpathentry>
<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources">
<attributes>
<attribute name="maven.pomderived" value="true"/>
<attribute name="test" value="true"/>
</attributes>
</classpathentry>
<classpathentry kind="output" path="target/classes"/>
</classpath>

11
.project
View File

@ -5,11 +5,21 @@
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.wst.common.project.facet.core.builder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.wst.validation.validationbuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
@ -19,5 +29,6 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.m2e.core.maven2Nature</nature>
<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
</natures>
</projectDescription>

7
.settings/org.eclipse.jdt.core.prefs
View File

@ -1,7 +1,14 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
org.eclipse.jdt.core.compiler.compliance=1.8
org.eclipse.jdt.core.compiler.debug.lineNumber=generate
org.eclipse.jdt.core.compiler.debug.localVariable=generate
org.eclipse.jdt.core.compiler.debug.sourceFile=generate
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=ignore
org.eclipse.jdt.core.compiler.release=disabled

3
.settings/org.eclipse.jpt.core.prefs Normal file
View File

@ -0,0 +1,3 @@
eclipse.preferences.version=1
org.eclipse.jpt.core.platform=hibernate2_1
org.eclipse.jpt.jpa.core.discoverAnnotatedClasses=true

7
.settings/org.eclipse.wst.common.project.facet.core.prefs.xml Normal file
View File

@ -0,0 +1,7 @@
<root>
<facet id="jpt.jpa">
<node name="libprov">
<attribute name="provider-id" value="jpa-no-op-library-provider"/>
</node>
</facet>
</root>

5
.settings/org.eclipse.wst.common.project.facet.core.xml Normal file
View File

@ -0,0 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<faceted-project>
<installed facet="java" version="1.8"/>
<installed facet="jpt.jpa" version="2.1"/>
</faceted-project>

3
.settings/org.hibernate.eclipse.console.prefs Normal file
View File

@ -0,0 +1,3 @@
default.configuration=envoy-server-standalone
eclipse.preferences.version=1
hibernate3.enabled=true

20
pom.xml
View File

@ -17,22 +17,34 @@
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>informatik-ag-ngl</groupId>
<groupId>com.github.informatik-ag-ngl</groupId>
<artifactId>envoy-common</artifactId>
<version>0.2-alpha</version>
<version>develop-SNAPSHOT</version><!-- <version>0.2-alpha</version> -->
</dependency>
<dependency>
<groupId>informatik-ag-ngl</groupId>
<groupId>com.github.informatik-ag-ngl</groupId>
<artifactId>java-nio-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<version>master-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.10.Final</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.9</version>
</dependency>
</dependencies>
<build>

79
src/main/java/envoy/server/ConnectionManager.java Normal file
View File

@ -0,0 +1,79 @@
package envoy.server;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import com.jenkov.nioserver.ISocketIdListener;
/**
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>ConnectionManager.java</strong><br>
* Created: <strong>03.01.2020</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class ConnectionManager implements ISocketIdListener {
/**
* Contains all socket IDs that have not yet performed a handshake / acquired
* their corresponding user ID.
*
* @since Envoy Server Standalone v0.1-alpha
*/
private Set<Long> pendingSockets = new HashSet<>();
/**
* Contains all socket IDs that have acquired a user ID as keys to these IDs.
*
* @since Envoy Server Standalone v0.1-alpha
*/
private Map<Long, Long> sockets = new HashMap<>();
private static ConnectionManager connectionManager = new ConnectionManager();
private ConnectionManager() {}
/**
* @return a singleton instance of this object
* @since Envoy Server Standalone v0.1-alpha
*/
public static ConnectionManager getInstance() { return connectionManager; }
@Override
public void socketCancelled(long socketId) {
if (!pendingSockets.remove(socketId))
sockets.entrySet().stream().filter(e -> e.getValue() == socketId).forEach(e -> sockets.remove(e.getValue()));
}
@Override
public void socketRegistered(long socketId) { pendingSockets.add(socketId); }
/**
* Associates a socket ID with a user ID.
*
* @param userId the user ID
* @param socketId the socket ID
* @since Envoy Server Standalone v0.1-alpha
*/
public void registerUser(long userId, long socketId) {
sockets.put(userId, socketId);
pendingSockets.remove(userId);
}
/**
* @param userId the ID of the user registered at the a socket
* @return the ID of the socket
* @since Envoy Server Standalone v0.1-alpha
*/
public long getSocketId(long userId) { return sockets.get(userId); }
/**
* @param userId the ID of the user to check for
* @return {@code true} if the user is online
* @since Envoy Server Standalone v0.1-alpha
*/
public boolean isOnline(long userId) { return sockets.containsKey(userId); }
}

29
src/main/java/envoy/server/LoginCredentialProcessor.java
View File

@ -1,29 +0,0 @@
package envoy.server;
import envoy.data.LoginCredentials;
import envoy.data.User;
/**
* This {@link ObjectProcessor} handles {@link LoginCredentials}.<br>
* <br>
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>LoginCredentialProcessor.java</strong><br>
* Created: <strong>30.12.2019</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class LoginCredentialProcessor implements ObjectProcessor<LoginCredentials, User> {
// TODO: Acquire user IDs from database
private static long currentUserId = 1;
@Override
public Class<LoginCredentials> getInputClass() { return LoginCredentials.class; }
@Override
public User process(LoginCredentials input) {
System.out.println("Received login credentials " + input);
return new User(currentUserId++, input.getName());
}
}

22
src/main/java/envoy/server/MessageProcessor.java
View File

@ -1,22 +0,0 @@
package envoy.server;
import envoy.data.Message;
/**
* This {@link ObjectProcessor} handles incoming {@link Message}s.<br>
* <br>
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>MessageProcessor.java</strong><br>
* Created: <strong>30.12.2019</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class MessageProcessor implements ObjectProcessor<Message, Void> {
@Override
public Class<Message> getInputClass() { return Message.class; }
@Override
public Void process(Message input) { return null; }
}

17
src/main/java/envoy/server/ObjectProcessor.java
View File

@ -1,5 +1,9 @@
package envoy.server;
import java.io.IOException;
import envoy.server.net.ObjectWriteProxy;
/**
* This interface defines methods for processing objects of a specific
* type incoming from a client.<br>
@ -10,21 +14,22 @@ package envoy.server;
*
* @author Kai S. K. Engelbart
* @param <T> type of the request object
* @param <U> type of the response object
* @since Envoy Server Standalone v0.1-alpha
*/
public interface ObjectProcessor<T, U> {
public interface ObjectProcessor<T> {
/**
* @return the Class of the request object
* @return the class of the request object
* @since Envoy Server Standalone v0.1-alpha
*/
Class<T> getInputClass();
/**
* @param input the request object
* @return the response object
* @param input the request object
* @param socketId the ID of the socket from which the object was received
* @param writeProxy the object that allows writing to a client
* @throws IOException if something went wrong during processing
* @since Envoy Server Standalone v0.1-alpha
*/
U process(T input);
void process(T input, long socketId, ObjectWriteProxy writeProxy) throws IOException;
}

11
src/main/java/envoy/server/Startup.java
View File

@ -6,6 +6,12 @@ import java.util.Set;
import com.jenkov.nioserver.Server;
import envoy.server.net.ObjectMessageProcessor;
import envoy.server.net.ObjectMessageReader;
import envoy.server.processors.EventProcessor;
import envoy.server.processors.LoginCredentialProcessor;
import envoy.server.processors.MessageProcessor;
/**
* Starts the server.<br>
* <br>
@ -26,10 +32,13 @@ public class Startup {
* @since Envoy Server Standalone v0.1-alpha
*/
public static void main(String[] args) throws IOException {
Set<ObjectProcessor<?, ?>> processors = new HashSet<>();
Set<ObjectProcessor<?>> processors = new HashSet<>();
processors.add(new LoginCredentialProcessor());
processors.add(new MessageProcessor());
processors.add(new EventProcessor());
// new PersistenceManager();
Server server = new Server(8080, () -> new ObjectMessageReader(), new ObjectMessageProcessor(processors));
server.start();
server.getSocketProcessor().registerSocketIdListener(ConnectionManager.getInstance());
}
}

43
src/main/java/envoy/server/data/Message.java
View File

@ -4,6 +4,7 @@ import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
@ -11,6 +12,7 @@ import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import envoy.data.MessageBuilder;
import envoy.server.database.PersistenceManager;
/**
* This class serves as a way to let Hibernate communicate with the server
@ -28,22 +30,34 @@ import envoy.data.MessageBuilder;
@Entity
@Table(name = "messages")
@NamedQueries(
{ @NamedQuery(query = "SELECT m FROM Message m WHERE m.recipient =:recipient AND m.state = 1", name = "getUnreadMessages"), @NamedQuery(
query = "SELECT m FROM Message m WHERE m.sender =:sender AND m.state = :state",
name = "find read messages"//TODO do we need this namedQuery?
), @NamedQuery(query = "SELECT m FROM Message m WHERE m.id = :messageId", name = "get message") }//TODO do we need this namedQuery?
{ @NamedQuery(
query = "SELECT m FROM Message m WHERE m.recipient =:recipient AND m.status = envoy.data.Message$MessageStatus.SENT",
name = "getUnreadMessages"
), @NamedQuery(
query = "SELECT m FROM Message m WHERE m.sender =:sender AND m.status = :status",
name = "find read messages"// TODO do we need this namedQuery?
), @NamedQuery(query = "SELECT m FROM Message m WHERE m.id = :messageId", name = "getMessageById") }
)
public class Message {
@Id
private long id;
private User sender, recipient;
private long id;
@ManyToOne
private User sender;
@ManyToOne
private User recipient;
@Temporal(TemporalType.TIMESTAMP)
private Date creationDate;
private Date creationDate;
@Temporal(TemporalType.TIMESTAMP)
private Date receivedDate;
private Date receivedDate;
@Temporal(TemporalType.TIMESTAMP)
private Date readDate;
private Date readDate;
private envoy.data.Message.MessageStatus status;
private String text;
private byte[] attachment;
@ -62,9 +76,14 @@ public class Message {
* @since Envoy Server Standalone v0.1-alpha
*/
public Message(envoy.data.Message message) {
id = message.getId();
status = message.getStatus();
text = message.getText();
PersistenceManager persMan = PersistenceManager.getPersistenceManager();
id = message.getId();
status = message.getStatus();
text = message.getText();
creationDate = message.getCreationDate();
sender = persMan.getUserById(message.getSenderId());
recipient = persMan.getUserById(message.getRecipientId());
// attachment = message.getAttachment().toByteArray();DOES NOT WORK YET
}
/**

40
src/main/java/envoy/server/data/User.java
View File

@ -3,6 +3,7 @@ package envoy.server.data;
import java.util.Date;
import java.util.List;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
@ -27,18 +28,47 @@ import javax.persistence.TemporalType;
*/
@Entity
@Table(name = "users")
@NamedQuery(query = "SELECT u FROM DBUser u WHERE u.id = :id", name = "getUserById")
@NamedQuery(query = "SELECT u FROM User u WHERE u.id = :id", name = "getUserById")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
private String name;
private byte[] passwordHash;
private long id;
private String name;
private byte[] passwordHash;
@Temporal(TemporalType.TIMESTAMP)
private Date lastSeen;
private envoy.data.User.UserStatus status;
private List<User> contacts;
@ElementCollection
private List<User> contacts;
/**
* Creates an instance of @link{User}.
* Solely used for JPA/ Hibernate
*
* @since Envoy Server Standalone v0.1-alpha
*/
public User() {}
/**
* Creates an instance of @link{User}.
*
* @param user the {@link envoy.data.User} to convert
* @since Envoy Server Standalone v0.1-alpha
*/
public User(envoy.data.User user) {
id = user.getId();
name = user.getName();
status = user.getStatus();
}
/**
* @return a database {@link User} converted into an {@link envoy.data.User}
* @since Envoy Server Standalone v0.1-alpha
*/
public envoy.data.User toCommonUser() { return new envoy.data.User(this.id, this.name); }
/**
* @return the id of a {link envoy.data.User}

28
src/main/java/envoy/server/database/PersistenceManager.java
View File

@ -20,6 +20,21 @@ import envoy.server.data.User;
*/
public class PersistenceManager {
private static final PersistenceManager persistenceManager = new PersistenceManager();
/**
* Creates the singleton instance of the @link{PersistenceManager}.
*
* @since Envoy Server Standalone v0.1-alpha
*/
private PersistenceManager() {}
/**
* @return the {@link PersistenceManager} singleton
* @since Envoy Server Standalone v0.1-alpha
*/
public static PersistenceManager getPersistenceManager() { return persistenceManager; }
private EntityManager entityManager = Persistence.createEntityManagerFactory("envoy").createEntityManager();
/**
@ -55,7 +70,7 @@ public class PersistenceManager {
public void updateMessage(Message message) { entityManager.unwrap(Session.class).merge(message); }
/**
* Searches for a user with a specific id.
* Searches for a {@link User} with a specific id.
*
* @param id - the id to search for
* @return the user with the specified id
@ -63,6 +78,17 @@ public class PersistenceManager {
*/
public User getUserById(long id) { return (User) entityManager.createNamedQuery("getUserById").setParameter("id", id).getSingleResult(); }
/**
* Searches for a {@link Message} with a specific id.
*
* @param id - the id to search for
* @return the message with the specified id
* @since Envoy Server Standalone v0.1-alpha
*/
public Message getMessageById(long id) {
return (Message) entityManager.createNamedQuery("getMessageById").setParameter("id", id).getSingleResult();
}
/**
* Returns all messages received while being offline.
*

30
src/main/java/envoy/server/ObjectMessageProcessor.java → src/main/java/envoy/server/net/ObjectMessageProcessor.java
View File

@ -1,16 +1,16 @@
package envoy.server;
package envoy.server.net;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Set;
import com.jenkov.nioserver.IMessageProcessor;
import com.jenkov.nioserver.Message;
import com.jenkov.nioserver.WriteProxy;
import envoy.server.ObjectProcessor;
/**
* Handles incoming objects.<br>
* <br>
@ -23,7 +23,7 @@ import com.jenkov.nioserver.WriteProxy;
*/
public class ObjectMessageProcessor implements IMessageProcessor {
private final Set<ObjectProcessor<?, ?>> processors;
private final Set<ObjectProcessor<?>> processors;
/**
* The constructor to set the {@link ObjectProcessor}s.
@ -31,7 +31,7 @@ public class ObjectMessageProcessor implements IMessageProcessor {
* @param processors the {@link ObjectProcessor} to set
* @since Envoy Server Standalone v0.1-alpha
*/
public ObjectMessageProcessor(Set<ObjectProcessor<?, ?>> processors) { this.processors = processors; }
public ObjectMessageProcessor(Set<ObjectProcessor<?>> processors) { this.processors = processors; }
@SuppressWarnings("unchecked")
@Override
@ -42,22 +42,10 @@ public class ObjectMessageProcessor implements IMessageProcessor {
// Process object
processors.stream().filter(p -> p.getInputClass().isInstance(obj)).forEach((@SuppressWarnings("rawtypes") ObjectProcessor p) -> {
Object responseObj = p.process(p.getInputClass().cast(obj));
if (responseObj != null) {
// Create message targeted at the client
Message response = writeProxy.getMessage();
response.socketId = message.socketId;
// Serialize object to byte array
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (ObjectOutputStream oout = new ObjectOutputStream(baos)) {
oout.writeObject(responseObj);
} catch (IOException e) {
e.printStackTrace();
}
byte[] objBytes = baos.toByteArray();
response.writeToMessage(objBytes);
writeProxy.enqueue(response);
try {
p.process(p.getInputClass().cast(obj), message.socketId, new ObjectWriteProxy(writeProxy));
} catch (IOException e) {
e.printStackTrace();
}
});
} catch (IOException | ClassNotFoundException e) {

16
src/main/java/envoy/server/ObjectMessageReader.java → src/main/java/envoy/server/net/ObjectMessageReader.java
View File

@ -1,14 +1,13 @@
package envoy.server;
package envoy.server.net;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import com.jenkov.nioserver.IMessageReader;
import com.jenkov.nioserver.Message;
import com.jenkov.nioserver.MessageBuffer;
import com.jenkov.nioserver.Socket;
import com.jenkov.nioserver.*;
import envoy.util.SerializationUtils;
/**
* This {@link IMessageReader} decodes serialized Java objects.<br>
@ -26,11 +25,6 @@ public class ObjectMessageReader implements IMessageReader {
private Message nextMessage;
private MessageBuffer messageBuffer;
private int fromByteArray(byte[] bytes, int offset) {
return ((bytes[offset] & 0xFF) << 24) | ((bytes[offset + 1] & 0xFF) << 16) | ((bytes[offset + 2] & 0xFF) << 8)
| ((bytes[offset + 3] & 0xFF) << 0);
}
@Override
public List<Message> getMessages() { return completeMessages; }
@ -54,7 +48,7 @@ public class ObjectMessageReader implements IMessageReader {
// Get message length
if (nextMessage.length - nextMessage.offset < 4) return;
int length = fromByteArray(nextMessage.sharedArray, nextMessage.offset) + 4;
int length = SerializationUtils.bytesToInt(nextMessage.sharedArray, nextMessage.offset) + 4;
if (nextMessage.length - nextMessage.offset >= length) {
Message message = messageBuffer.getMessage();

53
src/main/java/envoy/server/net/ObjectWriteProxy.java Normal file
View File

@ -0,0 +1,53 @@
package envoy.server.net;
import java.io.IOException;
import com.jenkov.nioserver.Message;
import com.jenkov.nioserver.WriteProxy;
import envoy.util.SerializationUtils;
/**
* This class defines methods to send an object to a client.<br>
* <br>
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>ObjectWriteProxy.java</strong><br>
* Created: <strong>04.01.2020</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class ObjectWriteProxy {
private final WriteProxy writeProxy;
/**
* Creates an instance of @link{ObjectWriteProxy}.
*
* @param writeProxy the {@link WriteProxy} to write objects to another client
* @since Envoy Server Standalone v0.1-alpha
*/
public ObjectWriteProxy(WriteProxy writeProxy) { this.writeProxy = writeProxy; }
/**
* @param recipientSocketId the socket id of the recipient
* @param obj the object to return to the client
* @throws IOException if the serialization of the object failed
* @since Envoy Server Standalone v0.1-alpha
*/
public void write(long recipientSocketId, Object obj) throws IOException {
// Create message targeted at the client
Message response = writeProxy.getMessage();
response.socketId = recipientSocketId;
// Serialize object to byte array
byte[] objBytes = SerializationUtils.writeToByteArray(obj);
// Acquire object length in bytes
byte[] objLen = SerializationUtils.intToBytes(objBytes.length);
response.writeToMessage(objLen);
response.writeToMessage(objBytes);
writeProxy.enqueue(response);
}
}

77
src/main/java/envoy/server/processors/EventProcessor.java Normal file
View File

@ -0,0 +1,77 @@
package envoy.server.processors;
import java.io.IOException;
import envoy.data.Message;
import envoy.data.Message.MessageStatus;
import envoy.event.Event;
import envoy.event.MessageStatusChangeEvent;
import envoy.exception.EnvoyException;
import envoy.server.ConnectionManager;
import envoy.server.ObjectProcessor;
import envoy.server.database.PersistenceManager;
import envoy.server.net.ObjectWriteProxy;
/**
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>EventProcessor.java</strong><br>
* Created: <strong>10 Jan 2020</strong><br>
*
* @author Leon Hofmeister
* @since Envoy Server Standalone v0.1-alpha
*/
public class EventProcessor implements ObjectProcessor<Event<?>> {
private Event<?> event;
/**
* Creates an instance of @link{EventProcessor}.
*
* @since Envoy Server Standalone v0.1-alpha
*/
public EventProcessor() {}
@SuppressWarnings("unchecked")
@Override
public Class<Event<?>> getInputClass() { return (Class<Event<?>>) event.getClass(); }
@Override
public void process(Event<?> input, long socketId, ObjectWriteProxy writeProxy) throws IOException {
event = input;
if (event instanceof MessageStatusChangeEvent) try {
applyMessageStatusChange((MessageStatusChangeEvent) event, writeProxy);
} catch (EnvoyException e) {
e.printStackTrace();
}
}
/**
* Redirects messageStatus changes to the database and to the recipient of the
* {@link Message}.
*
* @param event the {@link MessageStatusChangeEvent} to adjust
* @throws EnvoyException if the {@link Message} has an invalid state
* @since Envoy Server Standalone v0.1-alpha
*/
private void applyMessageStatusChange(MessageStatusChangeEvent event, ObjectWriteProxy writeProxy) throws EnvoyException {
if (!(event.get() == MessageStatus.READ))// check that no invalid MessageStatuses are sent
throw new EnvoyException("Message" + event.getId() + "has an invalid status");
ConnectionManager conMan = ConnectionManager.getInstance();
PersistenceManager perMan = PersistenceManager.getPersistenceManager();
envoy.server.data.Message msg = perMan.getMessageById(event.getId());
msg.setStatus(event.get());
msg.setReadDate(event.getDate());
if (conMan.isOnline(msg.getRecipient().getId())) try {
writeProxy.write(conMan.getSocketId(msg.getRecipient().getId()), event);
} catch (IOException e) {
System.err.println("Recipient online. Failed to send MessageStatusChangedEvent at message" + event.getId());
e.printStackTrace();
}
perMan.updateMessage(msg);
}
}

61
src/main/java/envoy/server/processors/LoginCredentialProcessor.java Normal file
View File

@ -0,0 +1,61 @@
package envoy.server.processors;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import envoy.data.Contacts;
import envoy.data.LoginCredentials;
import envoy.data.Message.MessageStatus;
import envoy.data.User;
import envoy.server.ConnectionManager;
import envoy.server.ObjectProcessor;
import envoy.server.data.Message;
import envoy.server.database.PersistenceManager;
import envoy.server.net.ObjectWriteProxy;
/**
* This {@link ObjectProcessor} handles {@link LoginCredentials}.<br>
* <br>
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>LoginCredentialProcessor.java</strong><br>
* Created: <strong>30.12.2019</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class LoginCredentialProcessor implements ObjectProcessor<LoginCredentials> {
// TODO: Acquire user IDs from database
private static long currentUserId = 1;
@Override
public Class<LoginCredentials> getInputClass() { return LoginCredentials.class; }
@Override
public void process(LoginCredentials input, long socketId, ObjectWriteProxy writeProxy) throws IOException {
System.out.println(String.format("Received login credentials %s from socket ID %d", input, socketId));
// Create user
User user = new User(currentUserId++, input.getName());
ConnectionManager.getInstance().registerUser(socketId, user.getId());
// Create contacts
Contacts contacts = new Contacts(user.getId(), new ArrayList<>());
// Complete handshake
System.out.println("Sending user...");
writeProxy.write(socketId, user);
System.out.println("Sending contacts...");
writeProxy.write(socketId, contacts);
System.out.println("Sending unread messages and updating them in the database...");
List<Message> pendingMessages = PersistenceManager.getPersistenceManager().getUnreadMessages(new envoy.server.data.User(user));
pendingMessages.forEach((msg) -> {
msg.setReceivedDate(new Date());
msg.setStatus(MessageStatus.RECEIVED);
PersistenceManager.getPersistenceManager().updateMessage(msg);
});
writeProxy.write(socketId, pendingMessages);
}
}

47
src/main/java/envoy/server/processors/MessageProcessor.java Normal file
View File

@ -0,0 +1,47 @@
package envoy.server.processors;
import java.io.IOException;
import java.util.Date;
import envoy.data.Message;
import envoy.event.MessageStatusChangeEvent;
import envoy.server.ConnectionManager;
import envoy.server.ObjectProcessor;
import envoy.server.database.PersistenceManager;
import envoy.server.net.ObjectWriteProxy;
/**
* This {@link ObjectProcessor} handles incoming {@link Message}s.<br>
* <br>
* Project: <strong>envoy-server-standalone</strong><br>
* File: <strong>MessageProcessor.java</strong><br>
* Created: <strong>30.12.2019</strong><br>
*
* @author Kai S. K. Engelbart
* @since Envoy Server Standalone v0.1-alpha
*/
public class MessageProcessor implements ObjectProcessor<Message> {
@Override
public Class<Message> getInputClass() { return Message.class; }
@Override
public void process(Message message, long socketId, ObjectWriteProxy writeProxy) {
ConnectionManager connectionManager = ConnectionManager.getInstance();
message.nextStatus();
if (connectionManager.isOnline(message.getRecipientId())) try {// if recipient is online, he receives the message directly
writeProxy.write(connectionManager.getSocketId(message.getRecipientId()), message);
} catch (IOException e) {
System.err.println("Recipient online. Failed to send message" + message.getId());
e.printStackTrace();
}
try {// sender receives confirmation that the server received the message
writeProxy.write(connectionManager.getSocketId(message.getSenderId()),
new MessageStatusChangeEvent(message.getId(), message.getStatus(), new Date()));
} catch (IOException e) {
e.printStackTrace();
}
PersistenceManager.getPersistenceManager().addMessage(new envoy.server.data.Message(message));
}
}

29
src/main/resources/META-INF/persistence.xml Normal file
View File

@ -0,0 +1,29 @@
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
version="2.1">
<persistence-unit name="envoy"
transaction-type="RESOURCE_LOCAL">
<properties>
<property name="javax.persistence.jdbc.driver"
value="org.postgresql.Driver" /> <!-- DB Driver -->
<property name="javax.persistence.jdbc.url"
value="jdbc:postgresql://localhost/envoy" /> <!-- BD Mane -->
<property name="javax.persistence.jdbc.user" value="envoy" /> <!-- DB User -->
<property name="javax.persistence.jdbc.password"
value="envoy" /> <!-- DB Password -->
<property name="hibernate.dialect"
value="org.hibernate.dialect.PostgreSQL95Dialect" /> <!-- DB Dialect -->
<property name="hibernate.hbm2ddl.auto" value="update" /> <!-- create / create-drop / update -->
<property name="hibernate.show_sql" value="true" /> <!-- Show SQL in console -->
<property name="hibernate.format_sql" value="true" /> <!-- Show SQL formatted -->
</properties>
</persistence-unit>
</persistence>