org.imixs.archive.service.cassandra

Class ClusterService

java.lang.Object

org.imixs.archive.service.cassandra.ClusterService

public class ClusterService
extends Object

The ClusterService provides methods to persist the content of a Imixs Document into a Cassandra keystore.

The service saves the content in XML format. The size of an XML representation of a Imixs document is only slightly different in size from the serialized map object. This is the reason why we do not store the document map in a serialized object format.

The ClusterService creates a Core-KeySpace automatically which is used for the internal management.

Author:

rsoika

Field Summary

Fields

Modifier and Type	Field and Description
static String	ENV_ARCHIVE_CLUSTER_CONTACTPOINTS
static String	ENV_ARCHIVE_CLUSTER_KEYSPACE
static String	ENV_ARCHIVE_CLUSTER_REPLICATION_CLASS
static String	ENV_ARCHIVE_CLUSTER_REPLICATION_FACTOR
static String	ENV_WORKFLOW_SERVICE_AUTHMETHOD
static String	ENV_WORKFLOW_SERVICE_ENDPOINT
static String	ENV_WORKFLOW_SERVICE_PASSWORD
static String	ENV_WORKFLOW_SERVICE_USER
static String	KEYSPACE_REGEX
static String	TABLE_SCHEMA_DOCUMENTS
static String	TABLE_SCHEMA_DOCUMENTS_DATA
static String	TABLE_SCHEMA_SNAPSHOTS
static String	TABLE_SCHEMA_SNAPSHOTS_BY_DOCUMENT
static String	TABLE_SCHEMA_SNAPSHOTS_BY_MODIFIED
static String	TABLE_SCHEMA_SNAPSHOTS_BY_UNIQUEID

Constructor Summary

Constructors

Constructor and Description
ClusterService()

Method Summary

Modifier and Type	Method and Description
protected void	createArchiveTableSchema(com.datastax.driver.core.Session session) This helper method creates the ImixsArchive document table schema if not yet exists
protected com.datastax.driver.core.Session	createKeySpace(String keySpace) This method creates a cassandra keySpace.
com.datastax.driver.core.Session	getSession()
protected com.datastax.driver.core.Cluster	initCluster() This method creates a Cassandra Cluster object.
boolean	isValidKeyspaceName(String keySpace) Test if the keyspace name is valid.

Methods inherited from class java.lang.Object

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

Field Detail

KEYSPACE_REGEX

public static final String KEYSPACE_REGEX

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Constant Field Values

ENV_ARCHIVE_CLUSTER_CONTACTPOINTS

public static final String ENV_ARCHIVE_CLUSTER_CONTACTPOINTS

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Constant Field Values

ENV_ARCHIVE_CLUSTER_KEYSPACE

public static final String ENV_ARCHIVE_CLUSTER_KEYSPACE

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Constant Field Values

ENV_ARCHIVE_CLUSTER_REPLICATION_FACTOR

public static final String ENV_ARCHIVE_CLUSTER_REPLICATION_FACTOR

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Constant Field Values

ENV_ARCHIVE_CLUSTER_REPLICATION_CLASS

public static final String ENV_ARCHIVE_CLUSTER_REPLICATION_CLASS

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Constant Field Values

ENV_WORKFLOW_SERVICE_ENDPOINT

public static final String ENV_WORKFLOW_SERVICE_ENDPOINT

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Constant Field Values

ENV_WORKFLOW_SERVICE_USER

public static final String ENV_WORKFLOW_SERVICE_USER

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Constant Field Values

ENV_WORKFLOW_SERVICE_PASSWORD

public static final String ENV_WORKFLOW_SERVICE_PASSWORD

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Constant Field Values

ENV_WORKFLOW_SERVICE_AUTHMETHOD

public static final String ENV_WORKFLOW_SERVICE_AUTHMETHOD

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Constant Field Values

TABLE_SCHEMA_SNAPSHOTS

public static final String TABLE_SCHEMA_SNAPSHOTS

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Constant Field Values

TABLE_SCHEMA_SNAPSHOTS_BY_UNIQUEID

public static final String TABLE_SCHEMA_SNAPSHOTS_BY_UNIQUEID

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Constant Field Values

TABLE_SCHEMA_SNAPSHOTS_BY_MODIFIED

public static final String TABLE_SCHEMA_SNAPSHOTS_BY_MODIFIED

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Constant Field Values

TABLE_SCHEMA_DOCUMENTS

public static final String TABLE_SCHEMA_DOCUMENTS

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Constant Field Values

TABLE_SCHEMA_SNAPSHOTS_BY_DOCUMENT

public static final String TABLE_SCHEMA_SNAPSHOTS_BY_DOCUMENT

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Constant Field Values

TABLE_SCHEMA_DOCUMENTS_DATA

public static final String TABLE_SCHEMA_DOCUMENTS_DATA

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Constant Field Values

Constructor Detail

ClusterService

public ClusterService()

Method Detail

getSession

public com.datastax.driver.core.Session getSession()

initCluster

protected com.datastax.driver.core.Cluster initCluster()
                                                throws ArchiveException

This method creates a Cassandra Cluster object. The cluster is defined by ContactPoints provided in the environmetn variable 'ARCHIVE_CLUSTER_CONTACTPOINTS' or in the imixs.property 'archive.cluster.contactpoints'

Returns:

Cassandra Cluster instacne

Throws:

ArchiveException

isValidKeyspaceName

public boolean isValidKeyspaceName(String keySpace)

Test if the keyspace name is valid.

Parameters:

keySpace -

Returns:

createKeySpace

protected com.datastax.driver.core.Session createKeySpace(String keySpace)
                                                   throws ArchiveException

This method creates a cassandra keySpace.

Depending on the KeyspaceType, the method creates the core table schema to store configurations, or the extended Archive table schcema which is used to store imixs documents.

Parameters:

cluster -

Throws:

ArchiveException

createArchiveTableSchema

protected void createArchiveTableSchema(com.datastax.driver.core.Session session)

This helper method creates the ImixsArchive document table schema if not yet exists