org.pentaho.di.trans.steps.named.cluster

类 NamedClusterEmbedManager

java.lang.Object

org.pentaho.di.trans.steps.named.cluster.NamedClusterEmbedManager

public class NamedClusterEmbedManager
extends Object

This class provides centralized logic to embed NamedClusters used by transformations/jobs in the embeddedMetaStore. There are two or three steps in implementing embeddedNamedClusters in support of a step/entry.

1) Make the getXml() method of the step call the the registerUrl method here with any url used by step/entry which may contain a reference to a named cluster. This class will parse the url and determine if a named cluster is present. If a named cluster is found it will be added to embeddedMetastore which will ultimately be written to the ktr file.

2) All accesses to KettleVFS.getFileObject should use a signature that provides a VariableSpace. This is because VFS will be passed a key to the embeddedMetastore through this nameSpace. Some steps already do this and some don't.

3) At run time call the passEmbeddedMetastoreKey method to set variable in the namespace used in step 2. Created by tkafalas on 7/14/2017.

字段概要

字段

限定符和类型	字段和说明
static String	NAMESPACE
protected static org.pentaho.metastore.persist.MetaStoreFactory	testMetaStoreFactory

构造器概要

构造器

构造器和说明
NamedClusterEmbedManager(AbstractMeta meta, org.pentaho.di.core.logging.LogChannelInterface log) Class creates an embedded metastores for NamedClusters

方法概要

限定符和类型	方法和说明
void	addClusterToMeta(String clusterName)
void	clear() Clear the embedded metastore of any named clusters
boolean	isAddedAnyClusters()
void	passEmbeddedMetastoreKey(org.pentaho.di.core.variables.VariableSpace nameSpace, String embeddedMetastoreProviderKey) Set the variable that will be used by Vfs to set the FileSystemOptions for the file system.
void	registerUrl(String urlString) If hc:// protocol is explicitly defined, check for a literal named Cluster.

从类继承的方法 java.lang.Object

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

字段详细资料

NAMESPACE

public static final String NAMESPACE

另请参阅:

常量字段值

testMetaStoreFactory

protected static org.pentaho.metastore.persist.MetaStoreFactory testMetaStoreFactory

构造器详细资料

NamedClusterEmbedManager

public NamedClusterEmbedManager(AbstractMeta meta,
                                org.pentaho.di.core.logging.LogChannelInterface log)

Class creates an embedded metastores for NamedClusters

参数:

meta - The TransMeta or JobMeta

方法详细资料

registerUrl

public void registerUrl(String urlString)

If hc:// protocol is explicitly defined, check for a literal named Cluster. If present, add that cluster to the embedded meta. If the cluster name starts with a variable, add all named clusters.

if the url starts with a variable, embed all named clusters.

参数:

urlString - The Url of the file being accessed as stored by the transformation/job

clear

public void clear()

Clear the embedded metastore of any named clusters

isAddedAnyClusters

public boolean isAddedAnyClusters()

addClusterToMeta

public void addClusterToMeta(String clusterName)

passEmbeddedMetastoreKey

public void passEmbeddedMetastoreKey(org.pentaho.di.core.variables.VariableSpace nameSpace,
                                     String embeddedMetastoreProviderKey)

Set the variable that will be used by Vfs to set the FileSystemOptions for the file system.

参数:

nameSpace - The namespace used by the getFileObject method to access VFS.

embeddedMetastoreProviderKey - The key to the embeddedMetastore from the AbstraceMeta