me.prettyprint.cassandra.service

Class AbstractCluster

java.lang.Object

me.prettyprint.cassandra.service.AbstractCluster

All Implemented Interfaces:

Cluster

Direct Known Subclasses:

ThriftCluster

public abstract class AbstractCluster
extends Object
implements Cluster

A cluster instance the client side representation of a cassandra server cluster. The cluster is usually the main entry point for programs using hector. To start operating on cassandra cluster you first get or create a cluster, then a keyspace operator for the keyspace you're interested in and then create mutations of queries //get a cluster: Cluster cluster = getOrCreateCluster("MyCluster", new CassandraHostConfigurator("127.0.0.1:9170")); //get a keyspace from this cluster: Keyspace ko = createKeyspace("Keyspace1", cluster); //Create a mutator: Mutator m = createMutator(ko); // Make a mutation: MutationResult mr = m.insert("key", cf, createColumn("name", "value", serializer, serializer)); THREAD SAFETY: This class is thread safe.

Author:

Ran Tavory, zznate

Field Summary

Fields

Modifier and Type	Field and Description
protected HConnectionManager	connectionManager
static int	RING_DELAY Linked to Cassandra StorageProxy.
static int	WAIT_FOR_SCHEMA_AGREEMENT_SLEEP_TIME
protected ExceptionsTranslator	xtrans

Constructor Summary

Constructors

Constructor and Description
AbstractCluster(String clusterName, CassandraHostConfigurator cassandraHostConfigurator)
AbstractCluster(String clusterName, CassandraHostConfigurator cassandraHostConfigurator, Map<String,String> credentials)

Method Summary

Methods

Modifier and Type	Method and Description
void	addHost(CassandraHost cassandraHost, boolean skipApplyConfig) Adds the host to this Cluster.
String	describeClusterName()
KeyspaceDefinition	describeKeyspace(String keyspace)
List<KeyspaceDefinition>	describeKeyspaces()
String	describePartitioner()
String	describeThriftVersion()
String	dropColumnFamily(String keyspaceName, String columnFamily) Drops a column family and does not wait for schema agreement.
String	dropColumnFamily(String keyspaceName, String columnFamily, boolean waitForSchemaAgreement) Drops a column family and waits for schema cluster agreement if waitForSchemaAgreement is set to true.
String	dropKeyspace(String keyspace) Drops the Keyspace from the cluster.
String	dropKeyspace(String keyspace, boolean waitForSchemaAgreement) Drops a Keyspace and waits for schema cluster agreement if waitForSchemaAgreement is set to true.
String	getClusterName()
CassandraHostConfigurator	getConfigurator()
HConnectionManager	getConnectionManager()
Map<String,String>	getCredentials()
Set<CassandraHost>	getKnownPoolHosts(boolean refresh)
String	getName() Descriptive name of the cluster.
void	onStartup() called after the cluster has been initialized.
void	truncate(String keyspaceName, String columnFamily)
protected static void	waitForSchemaAgreement(org.apache.cassandra.thrift.Cassandra.Client cassandra)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface me.prettyprint.hector.api.Cluster

addColumnFamily, addColumnFamily, addKeyspace, addKeyspace, describeRing, describeSchemaVersions, updateColumnFamily, updateColumnFamily, updateKeyspace, updateKeyspace

Field Detail

RING_DELAY

public static final int RING_DELAY

Linked to Cassandra StorageProxy.

See Also:

Constant Field Values

WAIT_FOR_SCHEMA_AGREEMENT_SLEEP_TIME

public static final int WAIT_FOR_SCHEMA_AGREEMENT_SLEEP_TIME

See Also:

Constant Field Values

connectionManager

protected final HConnectionManager connectionManager

xtrans

protected final ExceptionsTranslator xtrans

Constructor Detail

AbstractCluster

public AbstractCluster(String clusterName,
               CassandraHostConfigurator cassandraHostConfigurator)

AbstractCluster

public AbstractCluster(String clusterName,
               CassandraHostConfigurator cassandraHostConfigurator,
               Map<String,String> credentials)

Method Detail

getConnectionManager

public HConnectionManager getConnectionManager()

Specified by:

getConnectionManager in interface Cluster

getKnownPoolHosts

public Set<CassandraHost> getKnownPoolHosts(boolean refresh)

Specified by:

getKnownPoolHosts in interface Cluster

addHost

public void addHost(CassandraHost cassandraHost,
           boolean skipApplyConfig)

Description copied from interface: Cluster

Adds the host to this Cluster. Unless skipApplyConfig is set to true, the settings in the CassandraHostConfigurator will be applied to the provided CassandraHost

Specified by:

addHost in interface Cluster

getName

public String getName()

Description copied from interface: Cluster

Descriptive name of the cluster. This name is used to identify the cluster.

Specified by:

getName in interface Cluster

Returns:

describeKeyspaces

public List<KeyspaceDefinition> describeKeyspaces()
                                           throws HectorException

Specified by:

describeKeyspaces in interface Cluster

Throws:

HectorException

describeClusterName

public String describeClusterName()
                           throws HectorException

Specified by:

describeClusterName in interface Cluster

Throws:

HectorException

describeThriftVersion

public String describeThriftVersion()
                             throws HectorException

Specified by:

describeThriftVersion in interface Cluster

Throws:

HectorException

describeKeyspace

public KeyspaceDefinition describeKeyspace(String keyspace)
                                    throws HectorException

Specified by:

describeKeyspace in interface Cluster

Throws:

HectorException

getClusterName

public String getClusterName()
                      throws HectorException

Specified by:

getClusterName in interface Cluster

Throws:

HectorException

dropKeyspace

public String dropKeyspace(String keyspace)
                    throws HectorException

Description copied from interface: Cluster

Drops the Keyspace from the cluster. Equivalent of 'drop database' in SQL terms. Does not wait for schema agreement.

Specified by:

dropKeyspace in interface Cluster

Throws:

HectorException

dropKeyspace

public String dropKeyspace(String keyspace,
                  boolean waitForSchemaAgreement)
                    throws HectorException

Description copied from interface: Cluster

Drops a Keyspace and waits for schema cluster agreement if waitForSchemaAgreement is set to true. Otherwise it behaves exactly like: Cluster.dropKeyspace(String)

Specified by:

dropKeyspace in interface Cluster

Throws:

HectorException

describePartitioner

public String describePartitioner()
                           throws HectorException

Specified by:

describePartitioner in interface Cluster

Throws:

HectorException

dropColumnFamily

public String dropColumnFamily(String keyspaceName,
                      String columnFamily)
                        throws HectorException

Description copied from interface: Cluster

Drops a column family and does not wait for schema agreement.

Specified by:

dropColumnFamily in interface Cluster

Throws:

HectorException

dropColumnFamily

public String dropColumnFamily(String keyspaceName,
                      String columnFamily,
                      boolean waitForSchemaAgreement)
                        throws HectorException

Description copied from interface: Cluster

Drops a column family and waits for schema cluster agreement if waitForSchemaAgreement is set to true. Otherwise it behaves exactly like: Cluster.dropColumnFamily(String, String)

Specified by:

dropColumnFamily in interface Cluster

Throws:

HectorException

getCredentials

public Map<String,String> getCredentials()

Specified by:

getCredentials in interface Cluster

truncate

public void truncate(String keyspaceName,
            String columnFamily)
              throws HectorException

Specified by:

truncate in interface Cluster

Throws:

HectorException

onStartup

public void onStartup()

Description copied from interface: Cluster

called after the cluster has been initialized. Default implementation is to do nothing

Specified by:

onStartup in interface Cluster

getConfigurator

public CassandraHostConfigurator getConfigurator()

waitForSchemaAgreement

protected static void waitForSchemaAgreement(org.apache.cassandra.thrift.Cassandra.Client cassandra)
                                      throws org.apache.cassandra.thrift.InvalidRequestException,
                                             org.apache.thrift.TException,
                                             InterruptedException

Throws:

org.apache.cassandra.thrift.InvalidRequestException

org.apache.thrift.TException

InterruptedException