Examples of com.sleepycat.db.Environment

com.sleepycat.db.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); 
```
Environment handles are free-threaded unless {@link com.sleepycat.db.EnvironmentConfig#setThreaded EnvironmentConfig.setThreaded} is called to disable this before the environment is opened.
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.db.Database Database} or {@link com.sleepycat.db.Transaction Transaction}. Once {@link com.sleepycat.db.Environment#close Environment.close}is called, this object may not be accessed again, regardless of whether or not it throws an exception.

                checkRawFields(obj.getSuper(),
                               "kcomposite", embed,
                               "f_long2Integer", 111L,
                               "f_String2Long", "222");
            }
            Environment env = store.getEnvironment();


            assertDbExists(expectEvolved, env, NAME, "kBoolean");
            assertDbExists(expectEvolved, env, NAME, "kByte");
            assertDbExists(expectEvolved, env, NAME, "kShort");
            assertDbExists(expectEvolved, env, NAME, "kInteger");

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     * Is overridden in XACollectionTest.
     */
    protected Environment newEnvironment(File dir, EnvironmentConfig config)
        throws DatabaseException, IOException {


        return new Environment(dir, config);
    }

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        envConfig.setInitializeCache(true);
        envConfig.setInitializeLocking(true);
        if (create) {
            envConfig.setAllowCreate(true);
        }
        Environment env = new Environment(new File(dir), envConfig);


        // create the application and run a transaction
        HelloDatabaseWorld worker = new HelloDatabaseWorld(env);
        TransactionRunner runner = new TransactionRunner(env);
        try {

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        // db handles in java are free-threaded so long as the
        // env is also free-threaded.


        try {
            // Open the environment
            myEnv = new Environment(new File(myEnvPath),    // Env home
                                    myEnvConfig);


            // Open the database. Do not provide a txn handle. This open
            // is autocommitted because DatabaseConfig.setTransactional()
            // is true.

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        DatabaseEntry pkeyEntry = new DatabaseEntry();
        DatabaseEntry dataEntry = BasicIndex.NO_RETURN_ENTRY;
        pkeyBinding.objectToEntry(key, pkeyEntry);


        boolean autoCommit = false;
  Environment env = db.getEnvironment();
        if (transactional &&
      txn == null &&
      DbCompat.getThreadTransaction(env) == null) {
            txn = env.beginTransaction(null, null);
            autoCommit = true;
        }


        boolean failed = true;
        OperationStatus status;

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     * nested transactions are not supported by the environment.
     */
    public final Transaction beginTransaction(TransactionConfig config)
        throws DatabaseException {


        Environment env = getEnvironment();
        Trans trans = (Trans) localTrans.get();
        if (trans != null) {
            if (trans.txn != null) {
                if (!DbCompat.NESTED_TRANSACTIONS) {
                    throw new IllegalStateException(
                            "Nested transactions are not supported");
                }
                Transaction parentTxn = trans.txn;
                trans = new Trans(trans, config);
                trans.txn = env.beginTransaction(parentTxn, config);
                localTrans.set(trans);
            } else {
                trans.txn = env.beginTransaction(null, config);
                trans.config = config;
            }
        } else {
            trans = new Trans(null, config);
            trans.txn = env.beginTransaction(null, config);
            localTrans.set(trans);
        }
        return trans.txn;
    }

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        throws IOException, DatabaseException {


        int fixedLen = (isQueueOrRecno() ? 4 : 0);
        config.setKeyCreator(isRecNumFormat ? RECNO_EXTRACTOR
                                            : BYTE_EXTRACTOR);
        Environment env = primary.getEnvironment();
        return openDb(env, fileName, fixedLen, primary);
    }

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                DeletedPersist6_PersistToEntity obj =
                    new DeletedPersist6_PersistToEntity();
                index.put(obj);
                obj = index.get(obj.key);
                /* This new type should exist only after update. */
                Environment env = store.getEnvironment();
                EntityModel model = store.getModel();
                checkEntity(true, model, env, NAME, 1, null);
            }
        }

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    public void openEnv()
        throws IOException, DatabaseException {


        if (txnType == TXN_NULL) {
            TestEnv.BDB.copyConfig(envConfig);
            env = new Environment(envHome, envConfig);
        } else if (txnType == TXN_AUTO) {
            TestEnv.TXN.copyConfig(envConfig);
            env = new Environment(envHome, envConfig);
        } else if (txnType == TXN_USER) {
            TestEnv.TXN.copyConfig(envConfig);
            env = new Environment(envHome, envConfig);
        } else {
            assert false;
        }
    }

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     * Is overridden in XACollectionTest.
     */
    protected Environment newEnvironment(File dir, EnvironmentConfig config)
        throws DatabaseException, IOException {


        return new Environment(dir, config);
    }

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Related Classes of com.sleepycat.db.Environment

collections.access.AccessExample

collections.hello.HelloDatabaseWorld

collections.ship.basic.SampleDatabase

collections.ship.entity.SampleDatabase

collections.ship.factory.SampleDatabase

collections.ship.index.SampleDatabase

collections.ship.marshal.SampleDatabase

collections.ship.sentity.SampleDatabase

collections.ship.tuple.SampleDatabase

com.sleepycat.collections.CurrentTransaction

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