Java Monitor

Java Monitor (classic reader-writer problem) 1 writer & 2 readers

The writer fills data until the buffer is full. If the buffer is full (condition variable), then waits. Otherwise (i.e., the buffer is available), it fills data in the buffer. After that, it signals.

The reader reads data until the buffer is empty. If the buffer is empty (condition variable), then wait. Otherwise (i.e., the buffer is available), it reads data. After that, it signals.

Shared Memory & Semaphore

NOTE: BinarySemaphore is the same as Mutex (for one shared resource).

1. SharedMemoryBinarySemaphoreWriter & SharedMemoryBinarySemaphoreReader
First, run SharedMemoryBinarySemaphoreWriter.exe (this only writes data on the shared memory segment.)

SharedMemoryBinarySemaphoreWriter

Then, run SharedMemoryBinarySemaphoreReader.exe (it only reads data from the shared memory segment.)

SharedMemoryBinarySemaphoreReader

2. SharedMemoryBinarySemaphoreMasterSlave (Both master/slaves write/reads data to/from the shared memory segment.)
First, run SharedMemoryBinarySemaphoreMasterSlave.exe –master
Then, run SharedMemoryBinarySemaphoreMasterSlave.exe

SharedMemoryBinarySemaphoreMasterSlave

NOTE: Semaphore allows a specific number of processes/threads to enter.

3. SharedMemoryGeneralSemaphoreMasterSlave (classic reader-writer problem)

The writer fills data until the buffer is full. It waits emptyBufferSemaphore (e–) to be available. If so, it fills data. After that, it signals fullBufferSemaphore(f++) ready.

The reader reads data until the buffer is empty. It waits fullBufferSemaphore(f–) to be available. If so, it reads data. After that, it signals emptyBufferSemaphore(e++) to be ready.

1 master is the writer (fills data the shared memory buffer).

2 slaves are the readers (read data from the shared memory buffer; but their reader index must be synchronized).
First, run SharedMemoryGeneralSemaphoreMasterSlave.exe –master
Next, run SharedMemoryGeneralSemaphoreMasterSlave.exe
Then, run SharedMemoryGeneralSemaphoreMasterSlave.exe

SharedMemoryGeneralSemaphoreMasterSlave

Shared Memory & Mutex

1. SharedMemoryMutexWriter & SharedMemoryMutexReader
First, run SharedMemoryMutexWriter.exe (this only writes data on the shared memory segment.)
SharedMemoryMutexWriter

Then, run SharedMemoryMutexReader.exe (it only reads data from the shared memory segment.)
SharedMemoryMutexReader

2. SharedMemoryMutexMasterSlave (Both master/slaves write/reads data to/from the shared memory segment.)
First, run SharedMemoryMutexMasterSlave.exe –master
Then, run SharedMemoryMutexMasterSlave.exe
SharedMemoryMutexMasterSlave

Semaphore

Using binary semaphore (same as Mutex) for 1 shared resource

thread-binary-semaphore

Using binary semaphore (same as Mutex) ticket seller for 1 shared resource (ticket counter) and 4 sellers

thread-binary-semaphore -ticketSeller

Using semaphore for reader/writer problem (1 writer & 2 readers) sharing 5 integer buffers

thread-semaphore-readerWriter

HW7

-ApplicationLauncher-TCP/TCPApplicationLauncherServer/ApplicationLauncherServer.exe 실행

-TCP GUI Client 프로그램 작성 (Java 언어를 사용해서, app-menu.xml 파일을 읽어서, APP 개수만큼 토글 버튼 생성하고, 버튼을 누르면 해당 앱이 실행

-icons.zip 파일안에 이미지 있음

-제출: 소스코드 (반드시 주석처리 요망) 프로젝트 파일 전체 그리고 보고서를 묶어서 제출

app-menu.xml 파일 구조

<?xml version="1.0"?>
<APPLAUNCHER>
   <APP id="1001">
      <NAME>Notepad</NAME>
      <ICON>./icons/notepad.png</ICON>
      <APPLAUNCH_IP>127.0.0.1</APPLAUNCH_IP>
      <APPLAUNCH_PORT>32392</APPLAUNCH_PORT>
      <COMMAND>notepad.exe</COMMAND>
   </APP>
   <APP id="1002">
      <NAME>TCP Server</NAME>
      <ICON>./icons/tcp_server.png</ICON>
      <APPLAUNCH_IP>192.168.0.122</APPLAUNCH_IP>
      <APPLAUNCH_PORT>32392</APPLAUNCH_PORT>
      <COMMAND>D:\MM\courses\KyoungPark-DistributedMultimediaService2016\lab\CPPNetwork\TCP\server\Debug\TCPServerTest.exe 9001</COMMAND>
   </APP>
   <APP id="1003">
      <NAME>TCP Client</NAME>
      <ICON>./icons/tcp_client.png</ICON>
      <APPLAUNCH_IP>192.168.0.122</APPLAUNCH_IP>
      <APPLAUNCH_PORT>32392</APPLAUNCH_PORT>
      <COMMAND>D:\MM\courses\KyoungPark-DistributedMultimediaService2016\lab\CPPNetwork\TCP\client\Debug\TCPClientTest.exe 192.168.0.122 9001</COMMAND>
   </APP>
</APPLAUNCHER>

HW7 AppItemToggleButton 예시

public class AppItemToggleButton extends JToggleButton {
    int id;
    String name;
    String icon;
    String ip;
    int port;
    String command;

    public AppItemToggleButton(int id_) {
        id = id_;
        name = null;
        icon = null;
        ip = null;
        port = 0;
        command = null;
    }
// 중간생략..
}