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package tinystruct.examples;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Queue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.tinystruct.AbstractApplication;
import org.tinystruct.ApplicationException;
import org.tinystruct.data.component.Builder;
import org.tinystruct.system.ApplicationManager;
public class talk extends AbstractApplication {
private static final long TIMEOUT = 200;
protected final Map<String, Queue<Builder>> list = new ConcurrentHashMap<String, Queue<Builder>>();
protected final Map<String, Queue<Builder>> meetings = new ConcurrentHashMap<String, Queue<Builder>>();
protected final Map<String, List<String>> sessions = new ConcurrentHashMap<String, List<String>>();
private final ExecutorService service = Executors.newFixedThreadPool(3);
@Override
public void init() {
this.setAction("talk/update", "update");
this.setAction("talk/save", "save");
this.setAction("talk/version", "version");
this.setAction("talk/testing", "testing");
Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
@Override
public void run() {
service.shutdown();
while (true) {
try {
System.out.println("Waiting for the service to terminate...");
if (service.awaitTermination(5, TimeUnit.SECONDS)) {
System.out.println("Service will be terminated soon.");
break;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}));
}
/**
* To be used for testing.
* @param meetingCode
* @param sessionId
* @param message
* @return
*/
public String save(Object meetingCode, String sessionId, String message) {
if ( meetingCode != null ) {
if (message != null && !message.isEmpty()) {
final SimpleDateFormat format = new SimpleDateFormat("yyyy-M-d h:m:s");
final Builder builder = new Builder();
builder.put("user", "user_"+sessionId);
builder.put("time", format.format(new Date()));
builder.put("message", filter(message));
builder.put("session_id", sessionId);
return this.save(meetingCode, builder);
}
}
return "{}";
}
/**
* Save message and create a thread for copying it to message list of each session.
* @param meetingCode
* @param builder
* @return builder
*/
public final String save(final Object meetingCode, final Builder builder) {
final Queue<Builder> messages;
synchronized (this.meetings) {
if (this.meetings.get(meetingCode) == null) {
this.meetings.put(meetingCode.toString(), new ConcurrentLinkedQueue<Builder>());
}
messages = this.meetings.get(meetingCode);
messages.add(builder);
this.meetings.notifyAll();
}
service.execute(new Runnable(){
@Override
public void run() {
synchronized(talk.this.meetings) {
Builder message;
do {
try {
talk.this.meetings.wait(TIMEOUT);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while(talk.this.meetings.get(meetingCode) == null || (message = talk.this.meetings.get(meetingCode).poll()) == null);
talk.this.copy(meetingCode, message);
}
}
});
return builder.toString();
}
/**
* Poll message from the messages of the session specified sessionId.
* @param sessionId
* @return message
* @throws ApplicationException
* @throws IOException
*/
public final String update(final String sessionId) throws ApplicationException, IOException {
Builder message;
Queue<Builder> messages;
synchronized (this.list) {
messages = this.list.get(sessionId);
while((message = messages.poll()) == null) {
try {
this.list.wait(TIMEOUT);
} catch (InterruptedException e) {
throw new ApplicationException(e.getMessage(), e);
}
}
return message.toString();
}
}
/**
* This function can be override.
* @param text
* @return
*/
protected String filter(String text) {
return text;
}
/**
* Copy message to the list of each session.
* @param meetingCode
* @param builder
*/
private final void copy(Object meetingCode, Builder builder) {
synchronized(this.list) {
final Collection<Entry<String, Queue<Builder>>> set = list.entrySet();
final Iterator<Entry<String, Queue<Builder>>> iterator = set.iterator();
final List<String> meeting_session;
if((meeting_session = this.sessions.get(meetingCode)) != null) {
while(iterator.hasNext()) {
Entry<String, Queue<Builder>> e = iterator.next();
if(meeting_session.contains(e.getKey())) {
e.getValue().add(builder);
this.list.notifyAll();
}
}
}
else
this.list.notifyAll();
}
}
@Override
public String version() {
return "Welcome to use tinystruct 2.0";
}
/**
* This is a testing. It can be executed with the command:
* $ bin/dispatcher --import-applications=tinystruct.examples.talk talk/testing/100
*
* @param n
* @return
* @throws ApplicationException
*/
public boolean testing(final int n) throws ApplicationException {
this.meetings.put("[M001]", new ConcurrentLinkedQueue<Builder>());
this.list.put("{A}", new ConcurrentLinkedQueue<Builder>());
this.list.put("{B}", new ConcurrentLinkedQueue<Builder>());
List<String> sess = new ArrayList<String>();
sess.add("{A}");
sess.add("{B}");
this.sessions.put("[M001]", sess);
service.execute(new Runnable(){
@Override
public void run() {
int i=0;
while(i++<n)
try {
ApplicationManager.call("talk/save/[M001]/{A}/A post "+i, null);
Thread.sleep(1);
} catch (ApplicationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
service.execute(new Runnable(){
@Override
public void run() {
int i=0;
while(i++<n)
try {
ApplicationManager.call("talk/save/[M001]/{B}/B post "+i, null);
Thread.sleep(1);
} catch (ApplicationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
service.execute(new Runnable(){
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("[A] is started...");
while(true)
try {
System.out.println("**A**:"+ApplicationManager.call("talk/update/{A}", null));
Thread.sleep(1);
} catch (ApplicationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
service.execute(new Runnable(){
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("[B] is started...");
while(true)
try {
System.out.println("**B**:"+ApplicationManager.call("talk/update/{B}", null));
Thread.sleep(1);
} catch (ApplicationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
return true;
}
}