zdm/envoy
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Added EventProcessor and methods to handle MessageStatus changes

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additionally cleaned up whole project, fixed some Javadoc errors and
added a few database and connection options.

Sorry for the huge commit, there was almost no time inbetween where a
commit would have been possible, as to solve every problem, a new
problem arose.
However, as of now, f/message_handling should be ready to be merged into
develop, besides that it could not be tested yet.
This commit is contained in:
delvh
2020-01-11 18:28:48 +01:00
parent 3fc7ee7f3f
commit dc6199806f
13 changed files with 255 additions and 72 deletions
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16
src/main/java/envoy/server/ConnectionManager.java
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@@ -11,7 +11,7 @@ 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
*/
@@ -20,14 +20,14 @@ 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<>();
@@ -53,14 +53,14 @@ public class ConnectionManager implements ISocketIdListener {
/**
* Associates a socket ID with a user ID.
*
* @param socketId the socket ID
*
* @param userId the user ID
* @param socketId the socket ID
* @since Envoy Server Standalone v0.1-alpha
*/
public void registerUser(long socketId, long userId) {
sockets.put(socketId, userId);
pendingSockets.remove(socketId);
public void registerUser(long userId, long socketId) {
sockets.put(userId, socketId);
pendingSockets.remove(userId);
}
/**

32
src/main/java/envoy/server/MessageProcessor.java
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@@ -1,32 +0,0 @@
package envoy.server;
import envoy.data.Message;
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) {
// TODO: Send message to recipient if online
ConnectionManager connectionManager = ConnectionManager.getInstance();
if (connectionManager.isOnline(message.getRecipientId())) {
}
// TODO: Add message to database
}
}

7
src/main/java/envoy/server/ObjectProcessor.java
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@@ -25,9 +25,10 @@ public interface ObjectProcessor<T> {
Class<T> getInputClass();
/**
* @param input the request object
* @param socketId the ID of the socket from which the object was received
* @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
*/
void process(T input, long socketId, ObjectWriteProxy writeProxy) throws IOException;

4
src/main/java/envoy/server/Startup.java
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@@ -8,6 +8,9 @@ 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>
@@ -32,6 +35,7 @@ public class Startup {
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();

29
src/main/java/envoy/server/data/Message.java
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@@ -12,6 +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
@@ -32,16 +33,15 @@ import envoy.data.MessageBuilder;
{ @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 = "get message") }//TODO do we need this namedQuery?
), @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 long id;
@ManyToOne
private User sender;
@@ -50,13 +50,13 @@ public class Message {
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;
@@ -76,9 +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
}
/**

34
src/main/java/envoy/server/data/User.java
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@@ -33,16 +33,42 @@ 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;
@ElementCollection
private List<User> contacts;
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
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@@ -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.
*

18
src/main/java/envoy/server/net/ObjectMessageProcessor.java
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@@ -41,17 +41,13 @@ public class ObjectMessageProcessor implements IMessageProcessor {
System.out.println("Read object: " + obj.toString());
// Process object
processors.stream()
.filter(p -> p.getInputClass().isInstance(obj))
.forEach((@SuppressWarnings(
"rawtypes"
) ObjectProcessor p) -> {
try {
p.process(p.getInputClass().cast(obj), message.socketId, new ObjectWriteProxy(writeProxy));
} catch (IOException e) {
e.printStackTrace();
}
});
processors.stream().filter(p -> p.getInputClass().isInstance(obj)).forEach((@SuppressWarnings("rawtypes") ObjectProcessor p) -> {
try {
p.process(p.getInputClass().cast(obj), message.socketId, new ObjectWriteProxy(writeProxy));
} catch (IOException e) {
e.printStackTrace();
}
});
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}

14
src/main/java/envoy/server/net/ObjectWriteProxy.java
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@@ -8,6 +8,8 @@ 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>
@@ -19,8 +21,20 @@ 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();

77
src/main/java/envoy/server/processors/EventProcessor.java Normal file
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@@ -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);
}
}

17
src/main/java/envoy/server/LoginCredentialProcessor.java → src/main/java/envoy/server/processors/LoginCredentialProcessor.java
View File

@@ -1,11 +1,18 @@
package envoy.server;
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;
/**
@@ -42,5 +49,13 @@ public class LoginCredentialProcessor implements ObjectProcessor<LoginCredential
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
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@@ -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));
}
}