org.apache.manifoldcf.agents.transformation

Class BaseTransformationConnector

java.lang.Object

org.apache.manifoldcf.core.connector.BaseConnector

org.apache.manifoldcf.agents.transformation.BaseTransformationConnector

All Implemented Interfaces:

IPipelineConnector, ITransformationConnector, IConnector

public abstract class BaseTransformationConnector
extends BaseConnector
implements ITransformationConnector

This base class describes an instance of a connection between the Connector Framework and a document transformation engine. Each instance of this interface is used in only one thread at a time. Connection Pooling on these kinds of objects is performed by the factory which instantiates repository connectors from symbolic names and config parameters, and is pooled by these parameters. That is, a pooled connector handle is used only if all the connection parameters for the handle match. Implementers of this interface should provide a default constructor which has this signature:

 xxx();
 

Connectors are either configured or not. If configured, they will persist in a pool, and be reused multiple times. Certain methods of a connector may be called before the connector is configured. This includes basically all methods that permit inspection of the connector's capabilities.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	_rcsid

Fields inherited from class org.apache.manifoldcf.core.connector.BaseConnector

currentContext, params

Fields inherited from interface org.apache.manifoldcf.agents.interfaces.IPipelineConnector

DOCUMENTSTATUS_ACCEPTED, DOCUMENTSTATUS_REJECTED

Constructor Summary

Constructors

Constructor and Description
BaseTransformationConnector()

Method Summary

Modifier and Type	Method and Description
int	addOrReplaceDocumentWithException(java.lang.String documentURI, VersionContext pipelineDescription, RepositoryDocument document, java.lang.String authorityNameString, IOutputAddActivity activities) Add (or replace) a document in the output data store using the connector.
boolean	checkDateIndexable(VersionContext pipelineDescription, java.util.Date date, IOutputCheckActivity checkActivity) Detect if a document date is acceptable or not.
boolean	checkDocumentIndexable(VersionContext pipelineDescription, java.io.File localFile, IOutputCheckActivity checkActivity) Pre-determine whether a document (passed here as a File object) is acceptable or not.
boolean	checkLengthIndexable(VersionContext pipelineDescription, long length, IOutputCheckActivity checkActivity) Pre-determine whether a document's length is acceptable.
boolean	checkMimeTypeIndexable(VersionContext pipelineDescription, java.lang.String mimeType, IOutputCheckActivity checkActivity) Detect if a mime type is acceptable or not.
boolean	checkURLIndexable(VersionContext pipelineDescription, java.lang.String url, IOutputCheckActivity checkActivity) Pre-determine whether a document's URL is acceptable.
java.lang.String[]	getActivitiesList() Return the list of activities that this connector supports (i.e.
java.lang.String	getFormCheckJavascriptMethodName(int connectionSequenceNumber) Obtain the name of the form check javascript method to call.
java.lang.String	getFormPresaveCheckJavascriptMethodName(int connectionSequenceNumber) Obtain the name of the form presave check javascript method to call.
VersionContext	getPipelineDescription(Specification spec) Get a pipeline version string, given a pipeline specification object.
void	outputSpecificationBody(IHTTPOutput out, java.util.Locale locale, Specification os, int connectionSequenceNumber, int actualSequenceNumber, java.lang.String tabName) Output the specification body section.
void	outputSpecificationHeader(IHTTPOutput out, java.util.Locale locale, Specification os, int connectionSequenceNumber, java.util.List<java.lang.String> tabsArray) Output the specification header section.
java.lang.String	processSpecificationPost(IPostParameters variableContext, java.util.Locale locale, Specification os, int connectionSequenceNumber) Process a specification post.
boolean	requestInfo(Configuration output, java.lang.String command) Request arbitrary connector information.
void	viewSpecification(IHTTPOutput out, java.util.Locale locale, Specification os, int connectionSequenceNumber) View specification.

Methods inherited from class org.apache.manifoldcf.core.connector.BaseConnector

check, clearThreadContext, connect, deinstall, disconnect, getConfiguration, install, isConnected, outputConfigurationBody, outputConfigurationBody, outputConfigurationHeader, outputConfigurationHeader, outputConfigurationHeader, pack, packFixedList, packList, packList, poll, processConfigurationPost, processConfigurationPost, setThreadContext, unpack, unpackFixedList, unpackList, viewConfiguration, viewConfiguration

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.manifoldcf.core.interfaces.IConnector

check, clearThreadContext, connect, deinstall, disconnect, getConfiguration, install, isConnected, outputConfigurationBody, outputConfigurationHeader, poll, processConfigurationPost, setThreadContext, viewConfiguration

Field Detail

_rcsid

public static final java.lang.String _rcsid

See Also:

Constant Field Values

Constructor Detail

BaseTransformationConnector

public BaseTransformationConnector()

Method Detail

getActivitiesList

public java.lang.String[] getActivitiesList()

Return the list of activities that this connector supports (i.e. writes into the log).

Specified by:

getActivitiesList in interface ITransformationConnector

Returns:

the list.

requestInfo

public boolean requestInfo(Configuration output,
                           java.lang.String command)
                    throws ManifoldCFException

Request arbitrary connector information. This method is called directly from the API in order to allow API users to perform any one of several connector-specific queries.

Specified by:

requestInfo in interface ITransformationConnector

Parameters:

output - is the response object, to be filled in by this method.

command - is the command, which is taken directly from the API request.

Returns:

true if the resource is found, false if not. In either case, output may be filled in.

Throws:

ManifoldCFException

checkDateIndexable

public boolean checkDateIndexable(VersionContext pipelineDescription,
                                  java.util.Date date,
                                  IOutputCheckActivity checkActivity)
                           throws ManifoldCFException,
                                  ServiceInterruption

Detect if a document date is acceptable or not. This method is used to determine whether it makes sense to fetch a document in the first place.

Specified by:

checkDateIndexable in interface IPipelineConnector

Parameters:

pipelineDescription - is the document's pipeline version string, for this connection.

date - is the date of the document.

checkActivity - is an object including the activities that can be performed by this method.

Returns:

true if the document with that date can be accepted by this connector.

Throws:

ManifoldCFException

ServiceInterruption

checkMimeTypeIndexable

public boolean checkMimeTypeIndexable(VersionContext pipelineDescription,
                                      java.lang.String mimeType,
                                      IOutputCheckActivity checkActivity)
                               throws ManifoldCFException,
                                      ServiceInterruption

Detect if a mime type is acceptable or not. This method is used to determine whether it makes sense to fetch a document in the first place.

Specified by:

checkMimeTypeIndexable in interface IPipelineConnector

Parameters:

pipelineDescription - is the document's pipeline version string, for this connection.

mimeType - is the mime type of the document.

checkActivity - is an object including the activities that can be performed by this method.

Returns:

true if the mime type can be accepted by this connector.

Throws:

ManifoldCFException

ServiceInterruption

checkDocumentIndexable

public boolean checkDocumentIndexable(VersionContext pipelineDescription,
                                      java.io.File localFile,
                                      IOutputCheckActivity checkActivity)
                               throws ManifoldCFException,
                                      ServiceInterruption

Pre-determine whether a document (passed here as a File object) is acceptable or not. This method is used to determine whether a document needs to be actually transferred. This hook is provided mainly to support search engines that only handle a small set of accepted file types.

Specified by:

checkDocumentIndexable in interface IPipelineConnector

Parameters:

pipelineDescription - is the document's pipeline version string, for this connection.

localFile - is the local file to check.

checkActivity - is an object including the activities that can be done by this method.

Returns:

true if the file is acceptable, false if not.

Throws:

ManifoldCFException

ServiceInterruption

checkLengthIndexable

public boolean checkLengthIndexable(VersionContext pipelineDescription,
                                    long length,
                                    IOutputCheckActivity checkActivity)
                             throws ManifoldCFException,
                                    ServiceInterruption

Pre-determine whether a document's length is acceptable. This method is used to determine whether to fetch a document in the first place.

Specified by:

checkLengthIndexable in interface IPipelineConnector

Parameters:

pipelineDescription - is the document's pipeline version string, for this connection.

length - is the length of the document.

checkActivity - is an object including the activities that can be done by this method.

Returns:

true if the file is acceptable, false if not.

Throws:

ManifoldCFException

ServiceInterruption

checkURLIndexable

public boolean checkURLIndexable(VersionContext pipelineDescription,
                                 java.lang.String url,
                                 IOutputCheckActivity checkActivity)
                          throws ManifoldCFException,
                                 ServiceInterruption

Pre-determine whether a document's URL is acceptable. This method is used to help filter out documents that cannot be indexed in advance.

Specified by:

checkURLIndexable in interface IPipelineConnector

Parameters:

pipelineDescription - is the document's pipeline version string, for this connection.

url - is the URL of the document.

checkActivity - is an object including the activities that can be done by this method.

Returns:

true if the file is acceptable, false if not.

Throws:

ManifoldCFException

ServiceInterruption

getPipelineDescription

public VersionContext getPipelineDescription(Specification spec)
                                      throws ManifoldCFException,
                                             ServiceInterruption

Get a pipeline version string, given a pipeline specification object. The version string is used to uniquely describe the pertinent details of the specification and the configuration, to allow the Connector Framework to determine whether a document will need to be processed again. Note that the contents of any document cannot be considered by this method; only configuration and specification information can be considered. This method presumes that the underlying connector object has been configured.

Specified by:

getPipelineDescription in interface IPipelineConnector

Parameters:

spec - is the current pipeline specification object for this connection for the job that is doing the crawling.

Returns:

a string, of unlimited length, which uniquely describes configuration and specification in such a way that if two such strings are equal, nothing that affects how or whether the document is indexed will be different.

Throws:

ManifoldCFException

ServiceInterruption

addOrReplaceDocumentWithException

public int addOrReplaceDocumentWithException(java.lang.String documentURI,
                                             VersionContext pipelineDescription,
                                             RepositoryDocument document,
                                             java.lang.String authorityNameString,
                                             IOutputAddActivity activities)
                                      throws ManifoldCFException,
                                             ServiceInterruption,
                                             java.io.IOException

Add (or replace) a document in the output data store using the connector. This method presumes that the connector object has been configured, and it is thus able to communicate with the output data store should that be necessary. The OutputSpecification is *not* provided to this method, because the goal is consistency, and if output is done it must be consistent with the output description, since that was what was partly used to determine if output should be taking place. So it may be necessary for this method to decode an output description string in order to determine what should be done.

Specified by:

addOrReplaceDocumentWithException in interface IPipelineConnector

Parameters:

documentURI - is the URI of the document. The URI is presumed to be the unique identifier which the output data store will use to process and serve the document. This URI is constructed by the repository connector which fetches the document, and is thus universal across all output connectors.

pipelineDescription - is the description string that was constructed for this document by the getOutputDescription() method.

document - is the document data to be processed (handed to the output data store).

authorityNameString - is the name of the authority responsible for authorizing any access tokens passed in with the repository document. May be null.

activities - is the handle to an object that the implementer of a pipeline connector may use to perform operations, such as logging processing activity, or sending a modified document to the next stage in the pipeline.

Returns:

the document status (accepted or permanently rejected).

Throws:

java.io.IOException - only if there's a stream error reading the document data.

ManifoldCFException

ServiceInterruption

getFormCheckJavascriptMethodName

public java.lang.String getFormCheckJavascriptMethodName(int connectionSequenceNumber)

Obtain the name of the form check javascript method to call.

Specified by:

getFormCheckJavascriptMethodName in interface IPipelineConnector

Parameters:

connectionSequenceNumber - is the unique number of this connection within the job.

Returns:

the name of the form check javascript method.

getFormPresaveCheckJavascriptMethodName

public java.lang.String getFormPresaveCheckJavascriptMethodName(int connectionSequenceNumber)

Obtain the name of the form presave check javascript method to call.

Specified by:

getFormPresaveCheckJavascriptMethodName in interface IPipelineConnector

Parameters:

connectionSequenceNumber - is the unique number of this connection within the job.

Returns:

the name of the form presave check javascript method.

outputSpecificationHeader

public void outputSpecificationHeader(IHTTPOutput out,
                                      java.util.Locale locale,
                                      Specification os,
                                      int connectionSequenceNumber,
                                      java.util.List<java.lang.String> tabsArray)
                               throws ManifoldCFException,
                                      java.io.IOException

Output the specification header section. This method is called in the head section of a job page which has selected an output connection of the current type. Its purpose is to add the required tabs to the list, and to output any javascript methods that might be needed by the job editing HTML.

Specified by:

outputSpecificationHeader in interface IPipelineConnector

Parameters:

out - is the output to which any HTML should be sent.

locale - is the preferred local of the output.

os - is the current output specification for this job.

connectionSequenceNumber - is the unique number of this connection within the job.

tabsArray - is an array of tab names. Add to this array any tab names that are specific to the connector.

Throws:

ManifoldCFException

java.io.IOException

outputSpecificationBody

public void outputSpecificationBody(IHTTPOutput out,
                                    java.util.Locale locale,
                                    Specification os,
                                    int connectionSequenceNumber,
                                    int actualSequenceNumber,
                                    java.lang.String tabName)
                             throws ManifoldCFException,
                                    java.io.IOException

Output the specification body section. This method is called in the body section of a job page which has selected an output connection of the current type. Its purpose is to present the required form elements for editing. The coder can presume that the HTML that is output from this configuration will be within appropriate <html>, <body>, and <form> tags. The name of the form is "editjob".

Specified by:

outputSpecificationBody in interface IPipelineConnector

Parameters:

out - is the output to which any HTML should be sent.

locale - is the preferred local of the output.

os - is the current output specification for this job.

connectionSequenceNumber - is the unique number of this connection within the job.

actualSequenceNumber - is the connection within the job that has currently been selected.

tabName - is the current tab name.

Throws:

ManifoldCFException

java.io.IOException

processSpecificationPost

public java.lang.String processSpecificationPost(IPostParameters variableContext,
                                                 java.util.Locale locale,
                                                 Specification os,
                                                 int connectionSequenceNumber)
                                          throws ManifoldCFException

Process a specification post. This method is called at the start of job's edit or view page, whenever there is a possibility that form data for a connection has been posted. Its purpose is to gather form information and modify the output specification accordingly. The name of the posted form is "editjob".

Specified by:

processSpecificationPost in interface IPipelineConnector

Parameters:

variableContext - contains the post data, including binary file-upload information.

locale - is the preferred local of the output.

os - is the current output specification for this job.

connectionSequenceNumber - is the unique number of this connection within the job.

Returns:

null if all is well, or a string error message if there is an error that should prevent saving of the job (and cause a redirection to an error page).

Throws:

ManifoldCFException

viewSpecification

public void viewSpecification(IHTTPOutput out,
                              java.util.Locale locale,
                              Specification os,
                              int connectionSequenceNumber)
                       throws ManifoldCFException,
                              java.io.IOException

View specification. This method is called in the body section of a job's view page. Its purpose is to present the output specification information to the user. The coder can presume that the HTML that is output from this configuration will be within appropriate <html> and <body> tags.

Specified by:

viewSpecification in interface IPipelineConnector

Parameters:

out - is the output to which any HTML should be sent.

locale - is the preferred local of the output.

connectionSequenceNumber - is the unique number of this connection within the job.

os - is the current output specification for this job.

Throws:

ManifoldCFException

java.io.IOException