/** Common initializer. */
private void init() {
Metadata metadata = cluster.getMetadata();
LOGGER.info("Connected to cluster: {}", metadata.getClusterName());
for (Host h : metadata.getAllHosts()) {
LOGGER.info(
"Data center: {}; Hosts: {}; Rack: {}", h.getDatacenter(), h.getAddress(), h.getRack());
}
}
public void connect(String node) {
cluster = Cluster.builder().addContactPoint(node).build();
Metadata metadata = cluster.getMetadata();
System.out.printf("Connected to cluster: %s\n", metadata.getClusterName());
for (Host host : metadata.getAllHosts()) {
System.out.printf(
"Datatacenter: %s; Host: %s; Rack: %s\n",
host.getDatacenter(), host.getAddress(), host.getRack());
}
session = cluster.connect("whoami");
}
@Override
public void start() {
cluster = Cluster.builder().addContactPoint(address).build();
Metadata metadata = cluster.getMetadata();
LOGGER.debug("Connected to cluster: {0}", metadata.getClusterName());
for (Host host : metadata.getAllHosts()) {
LOGGER.debug(
"Datacenter: {0}; Host: {1}; Rack: {2}",
host.getDatacenter(), host.getAddress(), host.getRack());
}
session = cluster.connect();
try {
session.execute(
"CREATE KEYSPACE modeshape WITH replication "
+ "= {'class':'SimpleStrategy', 'replication_factor':3};");
} catch (AlreadyExistsException e) {
}
session.execute("USE modeshape;");
try {
session.execute(
"CREATE TABLE modeshape.binary("
+ "cid text PRIMARY KEY,"
+ "mime_type text,"
+ "ext_text text,"
+ "usage int,"
+ "usage_time timestamp,"
+ "payload blob)");
} catch (AlreadyExistsException e) {
}
try {
session.execute("CREATE INDEX USAGE_IDX ON modeshape.binary (usage);");
} catch (InvalidQueryException e) {
// exists
}
try {
session.execute("CREATE INDEX EXPIRE_IDX ON modeshape.binary (usage_time);");
} catch (InvalidQueryException e) {
// exists
}
}
public static Cluster createCluster(CassandraConfiguration config) throws DataSourceException {
boolean debugEnabled = false;
if (log.isDebugEnabled()) {
debugEnabled = true;
}
String userName = config.getUsername();
String password = config.getPassword();
List<String> connections = config.getHosts();
String clusterName = config.getClusterName();
int port = config.getPort();
boolean jmxDisabled = config.getJmxDisabled();
if (userName == null || password == null) {
throw new DataSourceException("Can't create cluster with empty userName or Password");
}
if (clusterName == null) {
throw new DataSourceException("Can't create cluster with empty cluster name");
}
if (connections == null || connections.isEmpty()) {
throw new DataSourceException("Can't create cluster with empty connection string");
}
int maxConnections = config.getMaxConnections();
int concurrency = config.getConcurrency();
boolean async = config.getAsync();
String compression = config.getCompression();
StringBuilder configProps = new StringBuilder();
configProps
.append(" concurrency: " + concurrency)
.append("\n mode: " + (async ? "asynchronous" : "blocking"))
.append("\n per-host connections: " + maxConnections)
.append("\n compression: " + compression);
if (debugEnabled) {
log.debug(configProps.toString());
}
Cluster cluster = null;
try {
PoolingOptions poolOptions = CassandraDatasourceUtils.createPoolingOptions(config);
SocketOptions socketOptions = CassandraDatasourceUtils.createSocketOptions(config);
// Create cluster
Builder builder = Cluster.builder();
for (String con : connections) {
builder.addContactPoints(con);
}
builder
.withPoolingOptions(poolOptions)
.withSocketOptions(socketOptions)
.withPort(port)
.withCredentials(userName, password);
CassandraDatasourceUtils.createRetryPolicy(config, builder);
CassandraDatasourceUtils.createReconnectPolicy(config, builder);
CassandraDatasourceUtils.createLoadBalancingPolicy(config, builder);
if (jmxDisabled) {
builder.withoutMetrics();
builder.withoutJMXReporting();
}
if (ProtocolOptions.Compression.SNAPPY.name().equalsIgnoreCase(compression)) {
builder.withCompression(ProtocolOptions.Compression.SNAPPY);
} else {
builder.withCompression(ProtocolOptions.Compression.NONE);
}
cluster = builder.build();
// validate cluster information after connect
StringBuilder metaDataAfterConnect = new StringBuilder();
Set<Host> allHosts = cluster.getMetadata().getAllHosts();
for (Host h : allHosts) {
metaDataAfterConnect.append("[");
metaDataAfterConnect.append(h.getDatacenter());
metaDataAfterConnect.append("-");
metaDataAfterConnect.append(h.getRack());
metaDataAfterConnect.append("-");
metaDataAfterConnect.append(h.getAddress());
metaDataAfterConnect.append("]\n");
}
if (debugEnabled) {
log.debug("Cassandra Cluster: " + metaDataAfterConnect.toString());
}
} catch (NoHostAvailableException ex) {
throw new DataSourceException(" No Host available to access ", ex);
} catch (Exception ex) {
throw new DataSourceException(" Can not create cluster ", ex);
}
return cluster;
}