Examples of com.sleepycat.je.Environment

com.sleepycat.je.Environment
an environment handle with default attributes. Environment env = new Environment(home, new EnvironmentConfig()); or
```
 Environment env = new Environment(home, null); 
```
Note that many Environment objects may access a single environment.

To create an environment or customize attributes, the application should customize the configuration class. For example:
```
 EnvironmentConfig envConfig = new EnvironmentConfig(); envConfig.setTransactional(true); envConfig.setAllowCreate(true); envConfig.setCacheSize(1000000); Environment newlyCreatedEnv = new Environment(home, envConfig); 
```
Note that environment configuration parameters can also be set through the <environment home>/je.properties file. This file takes precedence over any programmatically specified configuration parameters so that configuration changes can be made without recompiling. Environment configuration follows this order of precedence:
1. Configuration parameters specified in <environment home>/je.properties take first precedence.
2. Configuration parameters set in the EnvironmentConfig object used at Environment construction are next.
3. Any configuration parameters not set by the application are set to system defaults, described along with the parameter name String constants in the EnvironmentConfig class.
An environment handle is an Environment instance. More than one Environment instance may be created for the same physical directory, which is the same as saying that more than one Environment handle may be open at one time for a given environment.
The Environment handle should not be closed while any other handle remains open that is using it as a reference (for example, {@link com.sleepycat.je.Database Database} or {@link com.sleepycat.je.Transaction Transaction}. Once {@link com.sleepycat.je.Environment#close Environment.close} is called, this object may not be accessed again.

    public String getStats(String storeName, boolean fast) {
        try {
            if(environments.containsKey(storeName)) {
                StatsConfig config = new StatsConfig();
                config.setFast(fast);
                Environment env = environments.get(storeName);
                return env.getStats(config).toString();
            } else {
                // return empty string if environment not created yet
                return "";
            }
        } catch(DatabaseException e) {

View Full Code Here

    public void update(StoreDefinition storeDef) {
        if(!useOneEnvPerStore)
            throw new VoldemortException("Memory foot print can be set only when using different environments per store");


        String storeName = storeDef.getName();
        Environment environment = environments.get(storeName);
        // change reservation amount of reserved store
        if(!unreservedStores.contains(environment) && storeDef.hasMemoryFootprint()) {
            EnvironmentMutableConfig mConfig = environment.getMutableConfig();
            long currentCacheSize = mConfig.getCacheSize();
            long newCacheSize = storeDef.getMemoryFootprintMB() * ByteUtils.BYTES_PER_MB;
            if(currentCacheSize != newCacheSize) {
                long newReservedCacheSize = this.reservedCacheSize - currentCacheSize
                                            + newCacheSize;


                // check that we leave a 'minimum' shared cache
                if((voldemortConfig.getBdbCacheSize() - newReservedCacheSize) < voldemortConfig.getBdbMinimumSharedCache()) {
                    throw new StorageInitializationException("Reservation of "
                                                             + storeDef.getMemoryFootprintMB()
                                                             + " MB for store "
                                                             + storeName
                                                             + " violates minimum shared cache size of "
                                                             + voldemortConfig.getBdbMinimumSharedCache());
                }


                this.reservedCacheSize = newReservedCacheSize;
                adjustCacheSizes();
                mConfig.setCacheSize(newCacheSize);
                environment.setMutableConfig(mConfig);
                logger.info("Setting private cache for store " + storeDef.getName() + " to "
                            + newCacheSize);
            }
        } else {
            // we cannot support changing a reserved store to unreserved or vice

View Full Code Here

        dbConfig.setTransactional(true);
        dbConfig.setAllowCreate(false);
        dbConfig.setSortedDuplicates(areDuplicatesNeededForSrc());
        dbConfig.setReadOnly(true);


        srcEnv = new Environment(new File(sourceEnvPath), envConfig);
        srcDB = srcEnv.openDatabase(null, storeName, dbConfig);


        // Configure dest environment handle
        File newEnvDir = new File(destEnvPath);
        if(!newEnvDir.exists()) {
            newEnvDir.mkdirs();
        }


        envConfig = new EnvironmentConfig();
        envConfig.setTransactional(false);
        envConfig.setAllowCreate(true);
        envConfig.setReadOnly(false);
        envConfig.setCacheSize(1024 * 1024 * 1024);
        envConfig.setConfigParam(EnvironmentConfig.LOG_FILE_MAX,
                                 Long.toString(logFileSize * 1024L * 1024L));
        envConfig.setDurability(Durability.COMMIT_NO_SYNC);


        dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(false);
        dbConfig.setAllowCreate(true);
        dbConfig.setSortedDuplicates(areDuplicatesNeededForDest());
        dbConfig.setDeferredWrite(true);
        dbConfig.setNodeMaxEntries(nodeMax);


        dstEnv = new Environment(newEnvDir, envConfig);
        dstDB = dstEnv.openDatabase(null, storeName, dbConfig);


    }

View Full Code Here

  @Override
  public void start()
  {
    this.file.mkdirs();
    this.pool = this.poolFactory.createPool(this);
    Environment env = this.pool.take();
    try
    {
      env.openDatabase(null, STATE, new DatabaseConfig().setAllowCreate(true)).close();
      env.openDatabase(null, INVOCATION, new DatabaseConfig().setAllowCreate(true)).close();
      env.openDatabase(null, INVOKER, new DatabaseConfig().setAllowCreate(true)).close();
    }
    finally
    {
      this.pool.release(env);
    }

View Full Code Here

   * @see net.sf.hajdbc.pool.PoolProvider#create()
   */
  @Override
  public Environment create() throws DatabaseException
  {
    return new Environment(this.file, this.config);
  }

View Full Code Here

    void execute(Environment env, Transaction transaction);
  }
  
  private void execute(Operation... operations)
  {
    Environment env = this.pool.take();
    try
    {
      Transaction transaction = env.beginTransaction(null, null);
      try
      {
        for (Operation operation: operations)
        {
          operation.execute(env, transaction);

View Full Code Here

    T execute(Environment env);
  }
  
  private <T> T execute(Query<T> query)
  {
    Environment env = this.pool.take();
    try
    {
      return query.execute(env);
    }
    finally

View Full Code Here

    if(!file.isDirectory()) {
      if(!file.mkdirs()) {
        throw new DatabaseException("failed mkdirs(" + path + ")");
      }
    }
    env = new Environment(file, environmentConfig);
    DatabaseConfig databaseConfig = new DatabaseConfig();
    databaseConfig.setAllowCreate(true);
    databaseConfig.setTransactional(true);
//databaseConfig.setTransactional(false); TODO MC
//databaseConfig.setReadOnly(true); TODO MC

View Full Code Here

            EnvironmentConfig envConf = new EnvironmentConfig();
            envConf.setAllowCreate(true);
            File envDir = new File(dir);
            if (!envDir.exists())
                envDir.mkdirs();
            env = new Environment(envDir, envConf);
            
            DatabaseConfig dbConf = new DatabaseConfig();
            dbConf.setAllowCreate(true);
            dbConf.setSortedDuplicates(false);
            db = env.openDatabase(null, name, dbConf);

View Full Code Here

        envConfig.setTransactional(true);
        envConfig.setConfigParam("je.lock.nLockTables", "7");
        envConfig.setReadOnly(false);
        envConfig.setSharedCache(false);
        envConfig.setCacheSize(0);
        return new Environment(storeLocation, envConfig);
    }

View Full Code Here

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