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package jca.simple;
import java.rmi.RemoteException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.naming.Context;
import javax.naming.InitialContext;
import com.sleepycat.je.Cursor;
import com.sleepycat.je.Database;
import com.sleepycat.je.SecondaryDatabase;
import com.sleepycat.je.DatabaseConfig;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.SecondaryConfig;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.SecondaryKeyCreator;
import com.sleepycat.je.Transaction;
import com.sleepycat.je.jca.ra.JEConnection;
import com.sleepycat.je.jca.ra.JEConnectionFactory;
public class SimpleBean implements SessionBean {
/*
* Set this to something appropriate for your environment. Make sure it
* matches the ra.xml.
*/
private final String JE_ENV = "/tmp/je_store";
private final boolean TRANSACTIONAL = true;
private SessionContext sessionCtx;
public void ejbCreate() {
}
public void ejbRemove() {
}
public void setSessionContext(SessionContext context) {
sessionCtx = context;
}
public void unsetSessionContext() {
sessionCtx = null;
}
public void ejbActivate() {
}
public void ejbPassivate() {
}
public void put(String key, String data)
throws RemoteException {
try {
@SuppressWarnings("unused")
Environment env = null;
@SuppressWarnings("unused")
Transaction txn = null;
Database db = null;
@SuppressWarnings("unused")
SecondaryDatabase secDb = null;
Cursor cursor = null;
JEConnection dc = null;
try {
dc = getConnection(JE_ENV);
env = dc.getEnvironment();
DatabaseConfig dbConfig = new DatabaseConfig();
SecondaryConfig secDbConfig = new SecondaryConfig();
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(TRANSACTIONAL);
secDbConfig.setAllowCreate(true);
secDbConfig.setTransactional(TRANSACTIONAL);
secDbConfig.setKeyCreator(new MyKeyCreator());
/*
* Use JEConnection.openDatabase() to obtain a cached Database
* handle. Do not call close() on Database handles obtained
* using this method.
*/
db = dc.openDatabase("db", dbConfig);
secDb = dc.openSecondaryDatabase("secDb", db, secDbConfig);
cursor = db.openCursor(null, null);
cursor.put(new DatabaseEntry(key.getBytes("UTF-8")),
new DatabaseEntry(data.getBytes("UTF-8")));
} finally {
if (cursor != null) {
cursor.close();
}
if (dc != null) {
dc.close();
}
}
} catch (Exception e) {
System.err.println("Failure in put" + e);
}
}
public void removeDatabase()
throws RemoteException {
try {
JEConnection dc = null;
try {
dc = getConnection(JE_ENV);
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(TRANSACTIONAL);
/*
* Once you have removed a database from the environment,
* do not try to open it anymore.
*/
dc.removeDatabase("db");
} finally {
if (dc != null) {
dc.close();
}
}
} catch (Exception e) {
System.err.println("Failure in remove " + e);
e.printStackTrace();
}
}
public String get(String key)
throws RemoteException {
try {
@SuppressWarnings("unused")
Environment env = null;
@SuppressWarnings("unused")
Transaction txn = null;
Database db = null;
Cursor cursor = null;
JEConnection dc = null;
try {
dc = getConnection(JE_ENV);
env = dc.getEnvironment();
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(TRANSACTIONAL);
/*
* Use JEConnection.openDatabase() to obtain a cached Database
* handle. Do not call close() on Database handles obtained
* using this method.
*/
db = dc.openDatabase("db", dbConfig);
cursor = db.openCursor(null, null);
DatabaseEntry data = new DatabaseEntry();
cursor.getSearchKey(new DatabaseEntry(key.getBytes("UTF-8")),
data,
null);
return new String(data.getData(), "UTF-8");
} finally {
if (cursor != null) {
cursor.close();
}
if (dc != null) {
dc.close();
}
}
} catch (Exception e) {
System.err.println("Failure in get" + e);
e.printStackTrace();
}
return null;
}
private JEConnection getConnection(String envDir) {
try {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setTransactional(true);
envConfig.setAllowCreate(true);
InitialContext iniCtx = new InitialContext();
Context enc = (Context) iniCtx.lookup("java:comp/env");
Object ref = enc.lookup("ra/JEConnectionFactory");
JEConnectionFactory dcf = (JEConnectionFactory) ref;
JEConnection dc = dcf.getConnection(envDir, envConfig);
return dc;
} catch(Exception e) {
System.err.println("Failure in getConnection " + e);
}
return null;
}
private static class MyKeyCreator implements SecondaryKeyCreator {
MyKeyCreator() {
}
public boolean createSecondaryKey(SecondaryDatabase secondaryDb,
DatabaseEntry keyEntry,
DatabaseEntry dataEntry,
DatabaseEntry resultEntry)
throws DatabaseException {
return false;
}
}
}
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