TransactionInMemoryModule.java

/*
 * Copyright © 2012-2014 Cask Data, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package co.cask.tephra.runtime;

import co.cask.tephra.DefaultTransactionExecutor;
import co.cask.tephra.TransactionExecutor;
import co.cask.tephra.TransactionExecutorFactory;
import co.cask.tephra.TransactionManager;
import co.cask.tephra.TransactionSystemClient;
import co.cask.tephra.inmemory.InMemoryTxSystemClient;
import co.cask.tephra.metrics.MetricsCollector;
import co.cask.tephra.metrics.TxMetricsCollector;
import co.cask.tephra.persist.NoOpTransactionStateStorage;
import co.cask.tephra.persist.TransactionStateStorage;
import co.cask.tephra.snapshot.SnapshotCodecProvider;

import com.google.inject.AbstractModule;
import com.google.inject.Singleton;
import com.google.inject.assistedinject.FactoryModuleBuilder;

/**
 * Guice bindings for running completely in-memory (no persistence).  This should only be used for
 * test classes, as the transaction state cannot be recovered in the case of a failure.
 */
public class TransactionInMemoryModule extends AbstractModule {
  public TransactionInMemoryModule() {
  }

  @Override
  protected void configure() {
    bind(SnapshotCodecProvider.class).in(Singleton.class);
    bind(TransactionStateStorage.class).to(NoOpTransactionStateStorage.class).in(Singleton.class);
    bind(TransactionManager.class).in(Singleton.class);
    bind(TransactionSystemClient.class).to(InMemoryTxSystemClient.class).in(Singleton.class);
    // no metrics output for in-memory
    bind(MetricsCollector.class).to(TxMetricsCollector.class);

    install(new FactoryModuleBuilder()
              .implement(TransactionExecutor.class, DefaultTransactionExecutor.class)
              .build(TransactionExecutorFactory.class));
  }
}