org.modeshape.sequencer.teiid
Class VdbSequencer

java.lang.Object
  org.modeshape.sequencer.teiid.VdbSequencer

All Implemented Interfaces:

StreamSequencer

public class VdbSequencer
extends Object
implements StreamSequencer

A sequencer of Teiid Virtual Database (VDB) files.

Constructor Summary

VdbSequencer()

Method Summary

static Name	extractVersionInfomation(ExecutionContext context, String fileNameWithoutExtension, AtomicInteger version) Utility method to extract the version information from a VDB filename.
protected void	registerIfMissing(NamespaceRegistry registry, String prefix, String url)
void	sequence(InputStream stream, SequencerOutput output, StreamSequencerContext context) Sequence the data found in the supplied stream, placing the output information into the supplied map.

Methods inherited from class java.lang.Object

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

Constructor Detail

VdbSequencer

public VdbSequencer()

Method Detail

sequence

public void sequence(InputStream stream,
                     SequencerOutput output,
                     StreamSequencerContext context)

Sequence the data found in the supplied stream, placing the output information into the supplied map.

ModeShape's SequencingService determines the sequencers that should be executed by monitoring the changes to one or more workspaces that it is monitoring. Changes in those workspaces are aggregated and used to determine which sequencers should be called. If the sequencer implements this interface, then this method is called with the property that is to be sequenced along with the interface used to register the output. The framework takes care of all the rest.

Specified by:

sequence in interface StreamSequencer

Parameters:

stream - the stream with the data to be sequenced; never null

output - the output from the sequencing operation; never null

context - the context for the sequencing operation; never null

See Also:

StreamSequencer.sequence(java.io.InputStream, org.modeshape.graph.sequencer.SequencerOutput, org.modeshape.graph.sequencer.StreamSequencerContext)

registerIfMissing

protected void registerIfMissing(NamespaceRegistry registry,
                                 String prefix,
                                 String url)

extractVersionInfomation

public static Name extractVersionInfomation(ExecutionContext context,
                                            String fileNameWithoutExtension,
                                            AtomicInteger version)

Utility method to extract the version information from a VDB filename.

Parameters:

context - the execution context; may not be null

fileNameWithoutExtension - the filename for the VDB, without its extension; may not be null

version - the reference to the AtomicInteger that will be modified to contain the version

Returns:

the Name containing the 'fileNameWithoutExtension' value (without any trailing '.' characters); never null