SessionManager.java

/*
 * #%L
 * Processiva Business Processes Platform
 * %%
 * Copyright (C) 2012 Cohesiva
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

package com.cohesiva.processes.jbpm.serviceImpl.base;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.springframework.stereotype.Service;

import com.cohesiva.processes.jbpm.service.base.ISessionManager;

@Service
public class SessionManager implements ISessionManager {

	private final String filePath = "session";
	private File file;

	public SessionManager() {
		try {
			file = new File(filePath);

			if (!file.exists()) {

				file.createNewFile();
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public int getLatestSessionId() {
		int sessionId = -1;

		try {
			FileInputStream fis = new FileInputStream(file);
			DataInputStream dis = new DataInputStream(fis);
			
			sessionId = dis.readInt();
			
			dis.close();
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 

		return sessionId;
	}

	public void saveLatestSessionId(int sessionId) {
		try {			
			FileOutputStream fos = new FileOutputStream(file, false);
			DataOutputStream dos = new DataOutputStream(fos);
			
			dos.writeInt(sessionId);
			
			dos.close();
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}