org.alfresco.repo.content.http

Class HttpAlfrescoContentReader

java.lang.Object

org.alfresco.repo.content.AbstractContentAccessor

org.alfresco.repo.content.AbstractContentReader

org.alfresco.repo.content.http.HttpAlfrescoContentReader

All Implemented Interfaces:

org.alfresco.service.cmr.repository.ContentAccessor, org.alfresco.service.cmr.repository.ContentReader

public class HttpAlfrescoContentReader
extends AbstractContentReader

The reader that does the actual communication with the Alfresco HTTP application.

Since:

2.1

Author:

Derek Hulley

See Also:

HttpAlfrescoStore

Nested Class Summary

Nested classes/interfaces inherited from class org.alfresco.repo.content.AbstractContentAccessor

AbstractContentAccessor.CallbackFileChannel, AbstractContentAccessor.ChannelCloseCallbackAdvise

Constructor Summary

Constructors

Constructor and Description
HttpAlfrescoContentReader(TransactionService transactionService, AuthenticationService authenticationService, String baseHttpUrl, String contentUrl)

Method Summary

Modifier and Type	Method and Description
protected org.alfresco.service.cmr.repository.ContentReader	createReader() A factory method for subclasses to implement that will ensure the proper implementation of the ContentReader.getReader() method.
boolean	exists()
static String	generateURL(String baseHttpUrl, String contentUrl, String ticket, boolean infoOnly) Helper to generate a URL based on the ContentStore URL and ticket.
protected ReadableByteChannel	getDirectReadableChannel() Provides low-level access to read content from the repository.
long	getLastModified()
long	getSize()
String	toString()

Methods inherited from class org.alfresco.repo.content.AbstractContentReader

addListener, compareContentReaders, getContent, getContent, getContentInputStream, getContentString, getContentString, getFileChannel, getLimits, getReadableChannel, getReader, getTransformerDebug, getUseBufferedInputStream, isChannelOpen, isClosed, setLimits, setTransformerDebug, setUseBufferedInputStream

Methods inherited from class org.alfresco.repo.content.AbstractContentAccessor

channelOpened, finalize, getCallbackFileChannel, getContentData, getContentUrl, getEncoding, getLocale, getMimetype, setContentUrl, setEncoding, setLocale, setMimetype

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.alfresco.service.cmr.repository.ContentAccessor

getContentData, getContentUrl, getEncoding, getLocale, getMimetype, setEncoding, setLocale, setMimetype

Constructor Detail

HttpAlfrescoContentReader

public HttpAlfrescoContentReader(TransactionService transactionService,
                                 AuthenticationService authenticationService,
                                 String baseHttpUrl,
                                 String contentUrl)

Method Detail

toString

public String toString()

Overrides:

toString in class AbstractContentAccessor

exists

public boolean exists()

getLastModified

public long getLastModified()

getSize

public long getSize()

createReader

protected org.alfresco.service.cmr.repository.ContentReader createReader()
                                                                  throws org.alfresco.service.cmr.repository.ContentIOException

Description copied from class: AbstractContentReader

A factory method for subclasses to implement that will ensure the proper implementation of the ContentReader.getReader() method.

Only the instance need be constructed. The required mimetype, encoding, etc will be copied across by this class.

Specified by:

createReader in class AbstractContentReader

Returns:

Returns a reader onto the location referenced by this instance. The instance must always be a new instance.

Throws:

org.alfresco.service.cmr.repository.ContentIOException

getDirectReadableChannel

protected ReadableByteChannel getDirectReadableChannel()
                                                throws org.alfresco.service.cmr.repository.ContentIOException

Description copied from class: AbstractContentReader

Provides low-level access to read content from the repository.

This is the only of the content reading methods that needs to be implemented by derived classes. All other content access methods make use of this in their underlying implementations.

Specified by:

getDirectReadableChannel in class AbstractContentReader

Returns:

Returns a channel from which content can be read

Throws:

org.alfresco.service.cmr.repository.ContentIOException - if the channel could not be opened or the underlying content has disappeared

generateURL

public static final String generateURL(String baseHttpUrl,
                                       String contentUrl,
                                       String ticket,
                                       boolean infoOnly)

Helper to generate a URL based on the ContentStore URL and ticket.

Parameters:

baseHttpUrl - the first part of the URL pointing to the Alfresoc Web Application

contentUrl - the content URL - never null

ticket - the authentication ticket

infoOnly - true to add the info-only flag

Returns:

Returns the URL with which to access the servlet