Package com.wowza.wms.dvr

Class DefaultDvrStreamVersionHandler

Object

com.wowza.wms.dvr.DefaultDvrStreamVersionHandler

All Implemented Interfaces:

IDvrStreamVersionHandler

public class DefaultDvrStreamVersionHandler
extends Object
implements IDvrStreamVersionHandler

Default stream Version Handler. May be sub-classed

Constructor Summary

Constructors

Constructor	Description
DefaultDvrStreamVersionHandler()

Method Summary

Modifier and Type	Method	Description
IDvrStreamStore	determineExistingStoreForPlaying(IDvrStreamManager dvrMgr, String baseStreamName)	When a session requests a stream store w/o specifying the version, we need gto determine the version of the stream to store.
IDvrStreamStore	determineExistingStoreForRecording(IDvrStreamManager dvrMgr, String baseStreamName)	After a set of versioned streams are loaded from disk, one of them may be designated the stream that will be recorded to (i.e.
String	getArchiveStrategy(IDvrStreamManager dvrMgr, String baseStreamName)	Determine the archive strategy for a given set of streams.
boolean	handleArchivedStream(IDvrStreamManager dvrMgr, String baseStreamName, String vStreamName, SortedSet<Integer> versions, com.wowza.wms.dvr.io.manifest.DvrManifestHolder manifestHolder)	When a stream group inits, the file system is checked for older versions of the streams.
boolean	shouldDeleteArchivedStream(IDvrStreamManager dvrMgr, IDvrStreamStore store)	Determine if a given stream store version should be deleted.
boolean	shouldLoadArchivedStream(IDvrStreamManager dvrMgr, String baseStreamName, String vStreamName, SortedSet<Integer> versions, com.wowza.wms.dvr.io.manifest.DvrManifestHolder manifest)	Determine if a given stream store version should be loaded into WMS.

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultDvrStreamVersionHandler

public DefaultDvrStreamVersionHandler()

Method Details

getArchiveStrategy

public String getArchiveStrategy(IDvrStreamManager dvrMgr,
 String baseStreamName)

Description copied from interface: IDvrStreamVersionHandler

Determine the archive strategy for a given set of streams.

Typically, this returns the archive strategy as specified in Application.xml, but this API provides a hook for more detailed logic in determining the strategy.

Specified by:

getArchiveStrategy in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR App Instance Manager

baseStreamName - The base stream name (no version info). e.g. myStream

Returns:

the archive strategy

See Also:

• DefaultDvrStreamVersionHandler
• IDvrConstants.ARCHIVE_STRATEGY_APPEND
• IDvrConstants.ARCHIVE_STRATEGY_DELETE
• IDvrConstants.ARCHIVE_STRATEGY_VERSION

determineExistingStoreForRecording

public IDvrStreamStore determineExistingStoreForRecording(IDvrStreamManager dvrMgr,
 String baseStreamName)

Description copied from interface: IDvrStreamVersionHandler

After a set of versioned streams are loaded from disk, one of them may be designated the stream that will be recorded to (i.e. append mode).

The default implementation says that if append mode, then the highest versioned stream that has canRecord set to true is used. But this API, allows for a more detailed logic.

Specified by:

determineExistingStoreForRecording in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR Stream Manager

baseStreamName - The base stream name (no version info). e.g. myStream

Returns:

stream store to append to, null if no stream in the stream group is to be appended to.

See Also:

• DefaultDvrStreamVersionHandler

determineExistingStoreForPlaying

public IDvrStreamStore determineExistingStoreForPlaying(IDvrStreamManager dvrMgr,
 String baseStreamName)

Description copied from interface: IDvrStreamVersionHandler

When a session requests a stream store w/o specifying the version, we need gto determine the version of the stream to store.

The default implementation first checks the recording stream. If it 'canPlay(), it is returned. Otherwise, the highest versioned stream that canRecord set to true is used.

Specified by:

determineExistingStoreForPlaying in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR Stream Manager

baseStreamName - The base stream name (no version info). e.g. myStream

Returns:

stream store to stream, null if no stream in the stream group can be played.

See Also:

• DefaultDvrStreamVersionHandler

handleArchivedStream

public boolean handleArchivedStream(IDvrStreamManager dvrMgr,
 String baseStreamName,
 String vStreamName,
 SortedSet<Integer> versions,
 com.wowza.wms.dvr.io.manifest.DvrManifestHolder manifestHolder)

Description copied from interface: IDvrStreamVersionHandler

When a stream group inits, the file system is checked for older versions of the streams. This method is called to handle the streams.

Typically, 3 things can happen: The stream is ignored, loaded, or deleted.

Specified by:

handleArchivedStream in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR Stream Manager

baseStreamName - The base stream name (no version info). e.g. myStream

vStreamName - The version of the stream to be loaded.

versions - A sorted set of all the versions that are attempting to be loaded

manifestHolder - The main manifest info of the stream

Returns:

true if handled in some manner, false if ignored (unhandled)

See Also:

• DefaultDvrStreamVersionHandler

shouldLoadArchivedStream

public boolean shouldLoadArchivedStream(IDvrStreamManager dvrMgr,
 String baseStreamName,
 String vStreamName,
 SortedSet<Integer> versions,
 com.wowza.wms.dvr.io.manifest.DvrManifestHolder manifest)

Description copied from interface: IDvrStreamVersionHandler

Determine if a given stream store version should be loaded into WMS.

Specified by:

shouldLoadArchivedStream in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR Stream Manager

baseStreamName - The base stream name (no version info). e.g. myStream

vStreamName - The version of the stream to be loaded.

versions - A sorted set of all the versions that are attempting to be loaded

manifest - The main manifest info of the stream

Returns:

true if should be loaded. false if not.

See Also:

• DefaultDvrStreamVersionHandler

shouldDeleteArchivedStream

public boolean shouldDeleteArchivedStream(IDvrStreamManager dvrMgr,
 IDvrStreamStore store)

Description copied from interface: IDvrStreamVersionHandler

Determine if a given stream store version should be deleted.

Specified by:

shouldDeleteArchivedStream in interface IDvrStreamVersionHandler

Parameters:

dvrMgr - The DVR Stream Manager

store - The DVR store

Returns:

true if should be deleted. false if not.

See Also:

• DefaultDvrStreamVersionHandler