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.

        this.store.put(new ByteArray("abc".getBytes()),
                       new Versioned<byte[]>("cdef".getBytes()),
                       null);
        this.store.close();
        this.environment.close();
        this.environment = new Environment(this.tempDir, envConfig);
        this.database = environment.openDatabase(null, "test", databaseConfig);
        this.store = makeBdbStorageEngine("test",
                                          this.environment,
                                          this.database,
                                          runtimeConfig,

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    envConfig.setCacheSize(512 * 1024 * 1024);
    
    final File envDir = new File(_storagePath);
    if (!envDir.exists())
      envDir.mkdirs();
    _env = new Environment(envDir, envConfig);


    final DatabaseConfig dbConfig = new DatabaseConfig();
    dbConfig.setAllowCreate(true);
    dbConfig.setTemporary(true); // opposite to DiskPermanent
    dbConfig.setTransactional(false);

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        @Override
        public FlumePersistentManager createManager(final String name, final FactoryData data) {
            SecretKey secretKey = null;


            Database database;
            Environment environment;


            Map<String, String> properties = new HashMap<String, String>();
            if (data.properties != null) {
                for (Property property : data.properties) {
                    properties.put(property.getName(), property.getValue());
                }
            }


            try {


                File dir = new File(data.dataDir);
                FileUtils.mkdir(dir, true);
                final EnvironmentConfig dbEnvConfig = new EnvironmentConfig();
                dbEnvConfig.setTransactional(true);
                dbEnvConfig.setAllowCreate(true);
                dbEnvConfig.setLockTimeout(5, TimeUnit.SECONDS);
                environment = new Environment(dir, dbEnvConfig);
                final DatabaseConfig dbConfig = new DatabaseConfig();
                dbConfig.setTransactional(true);
                dbConfig.setAllowCreate(true);
                database = environment.openDatabase(null, name, dbConfig);
            } catch (final Exception ex) {
                LOGGER.error("Could not create FlumePersistentManager", ex);
                return null;
            }

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    DatabaseConfig dbConfig = new DatabaseConfig();
    dbConfig.setAllowCreate(true);
    EnvironmentConfig ec = new EnvironmentConfig();
    ec.setAllowCreate(true);
    env = new Environment(dir, ec);
    db = env.openDatabase(null, name, dbConfig);
    lastDocID = 0;
  }

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        db = secIndex.getDatabase();
        transactional = secIndex.transactional;
        sortedDups = secIndex.sortedDups;
        locking =
            DbCompat.getInitializeLocking(db.getEnvironment().getConfig());
        Environment env = db.getEnvironment();
        concurrentDB = DbCompat.getInitializeCDB(env.getConfig());
        keyObject = key;
        keyEntry = new DatabaseEntry();
        secIndex.keyBinding.objectToEntry(key, keyEntry);
        singleKeyRange = secIndex.emptyRange.subRange(keyEntry);

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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, secIndex.getAutoCommitTransactionConfig());
            autoCommit = true;
        }


        boolean failed = true;

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        DatabaseEntry keyEntry = new DatabaseEntry();
        DatabaseEntry dataEntry = new DatabaseEntry();
        assignKey(entity, keyEntry);


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

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        DatabaseConfig config = db.getConfig();
        transactional = config.getTransactional();
        sortedDups = config.getSortedDuplicates();
        locking =
            DbCompat.getInitializeLocking(db.getEnvironment().getConfig());
        Environment env = db.getEnvironment();
        concurrentDB = DbCompat.getInitializeCDB(env.getConfig());
        this.keyClass = keyClass;
        this.keyBinding = keyBinding;
        this.entityAdapter = entityAdapter;


        emptyRange = new KeyRange(config.getBtreeComparator());

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                 doRecovery ? "true" : "false");
            /* Even without recovery, scavenger needs comparators. */
            envConfiguration.setConfigParam
                (EnvironmentParams.ENV_COMPARATORS_REQUIRED.getName(), "true");
        
            env = new Environment(envHome, envConfiguration);
        }
    }

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                    locker,
                    new TriggerInvoker(isNew) {
            @Override
                            public void run(Transaction triggerTransaction,
                                            Trigger dbt) {
                            Environment env =
                                getOpenTriggerEnvironment(triggerTransaction);
                            dbt.open(triggerTransaction, env, isNew);
            }
                    }
                    );

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