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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.dao.cassandra;
import java.util.List;
import javax.annotation.PreDestroy;
import com.datastax.driver.core.SocketOptions;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.policies.ConstantReconnectionPolicy;
import com.datastax.driver.core.policies.DCAwareRoundRobinPolicy;
import com.datastax.driver.core.policies.DefaultRetryPolicy;
import com.datastax.driver.core.policies.LoadBalancingPolicy;
import com.datastax.driver.core.policies.TokenAwarePolicy;
import com.datastax.driver.mapping.Mapper;
import com.datastax.driver.mapping.MappingManager;
import fj.data.Either;
@Component("cassandra-client")
public class CassandraClient {
private static Logger logger = LoggerFactory.getLogger(CassandraClient.class.getName());
private Cluster cluster;
private boolean isConnected;
public CassandraClient() {
super();
isConnected = false;
List<String> cassandraHosts = null;
try {
cassandraHosts = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
.getCassandraHosts();
Long reconnectTimeout = ConfigurationManager.getConfigurationManager().getConfiguration()
.getCassandraConfig().getReconnectTimeout();
logger.debug("creating cluster to hosts:{} with reconnect timeout:{}", cassandraHosts, reconnectTimeout);
Cluster.Builder clusterBuilder = Cluster.builder()
.withReconnectionPolicy(new ConstantReconnectionPolicy(reconnectTimeout))
.withRetryPolicy(DefaultRetryPolicy.INSTANCE);
cassandraHosts.forEach(host -> clusterBuilder.addContactPoint(host));
setSocketOptions(clusterBuilder);
enableAuthentication(clusterBuilder);
enableSsl(clusterBuilder);
setLocalDc(clusterBuilder);
cluster = clusterBuilder.build();
isConnected = true;
} catch (Exception e) {
logger.info("** CassandraClient isn't connected to {}", cassandraHosts);
}
logger.info("** CassandraClient created");
}
private void setSocketOptions(Cluster.Builder clusterBuilder) {
SocketOptions socketOptions =new SocketOptions();
Integer socketConnectTimeout = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig().getSocketConnectTimeout();
if( socketConnectTimeout!=null ){
logger.info("SocketConnectTimeout was provided, setting Cassandra client to use SocketConnectTimeout: {} .",socketConnectTimeout);
socketOptions.setConnectTimeoutMillis(socketConnectTimeout);
}
Integer socketReadTimeout = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig().getSocketReadTimeout();
if( socketReadTimeout != null ){
logger.info("SocketReadTimeout was provided, setting Cassandra client to use SocketReadTimeout: {} .",socketReadTimeout);
socketOptions.setReadTimeoutMillis(socketReadTimeout);
}
clusterBuilder.withSocketOptions(socketOptions);
}
private void setLocalDc(Cluster.Builder clusterBuilder) {
String localDataCenter = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
.getLocalDataCenter();
if (localDataCenter != null) {
logger.info("localDatacenter was provided, setting Cassndra clint to use datacenter: {} as local.",
localDataCenter);
LoadBalancingPolicy tokenAwarePolicy = new TokenAwarePolicy(
DCAwareRoundRobinPolicy.builder().withLocalDc(localDataCenter).build());
clusterBuilder.withLoadBalancingPolicy(tokenAwarePolicy);
} else {
logger.info(
"localDatacenter was provided, the driver will use the datacenter of the first contact point that was reached at initialization");
}
}
private void enableSsl(Cluster.Builder clusterBuilder) {
boolean ssl = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig().isSsl();
if (ssl) {
String truststorePath = ConfigurationManager.getConfigurationManager().getConfiguration()
.getCassandraConfig().getTruststorePath();
String truststorePassword = ConfigurationManager.getConfigurationManager().getConfiguration()
.getCassandraConfig().getTruststorePassword();
if (truststorePath == null || truststorePassword == null) {
logger.error("ssl is enabled but truststorePath or truststorePassword were not supplied.");
} else {
System.setProperty("javax.net.ssl.trustStore", truststorePath);
System.setProperty("javax.net.ssl.trustStorePassword", truststorePassword);
clusterBuilder.withSSL();
}
}
}
private void enableAuthentication(Cluster.Builder clusterBuilder) {
boolean authenticate = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
.isAuthenticate();
if (authenticate) {
String username = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
.getUsername();
String password = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig()
.getPassword();
if (username == null || password == null) {
logger.error("authentication is enabled but username or password were not supplied.");
} else {
clusterBuilder.withCredentials(username, password);
}
}
}
/**
*
* @param keyspace
* - key space to connect
* @return
*/
public Either<ImmutablePair<Session, MappingManager>, CassandraOperationStatus> connect(String keyspace) {
if (cluster != null) {
try {
Session session = cluster.connect(keyspace);
if (session != null) {
MappingManager manager = new MappingManager(session);
return Either.left(new ImmutablePair<Session, MappingManager>(session, manager));
} else {
return Either.right(CassandraOperationStatus.KEYSPACE_NOT_CONNECTED);
}
} catch (Throwable e) {
logger.debug("Failed to connect to keyspace [{}], error :", keyspace, e);
return Either.right(CassandraOperationStatus.KEYSPACE_NOT_CONNECTED);
}
}
return Either.right(CassandraOperationStatus.CLUSTER_NOT_CONNECTED);
}
public <T> CassandraOperationStatus save(T entity, Class<T> clazz, MappingManager manager) {
if (!isConnected) {
return CassandraOperationStatus.CLUSTER_NOT_CONNECTED;
}
try {
Mapper<T> mapper = manager.mapper(clazz);
mapper.save(entity);
} catch (Exception e) {
logger.debug("Failed to save entity [{}], error :", entity, e);
return CassandraOperationStatus.GENERAL_ERROR;
}
return CassandraOperationStatus.OK;
}
public <T> Either<T, CassandraOperationStatus> getById(String id, Class<T> clazz, MappingManager manager) {
if (!isConnected) {
return Either.right(CassandraOperationStatus.CLUSTER_NOT_CONNECTED);
}
try {
Mapper<T> mapper = manager.mapper(clazz);
T result = mapper.get(id);
if (result == null) {
return Either.right(CassandraOperationStatus.NOT_FOUND);
}
return Either.left(result);
} catch (Exception e) {
logger.debug("Failed to get by Id [{}], error :", id, e);
return Either.right(CassandraOperationStatus.GENERAL_ERROR);
}
}
public <T> CassandraOperationStatus delete(String id, Class<T> clazz, MappingManager manager) {
if (!isConnected) {
return CassandraOperationStatus.CLUSTER_NOT_CONNECTED;
}
try {
Mapper<T> mapper = manager.mapper(clazz);
mapper.delete(id);
} catch (Exception e) {
logger.debug("Failed to delete by id [{}], error :", id, e);
return CassandraOperationStatus.GENERAL_ERROR;
}
return CassandraOperationStatus.OK;
}
public boolean isConnected() {
return isConnected;
}
@PreDestroy
public void closeClient() {
if (isConnected) {
cluster.close();
}
logger.info("** CassandraClient cluster closed");
}
}
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