Talend Scenario Based Questions: Components

logs & Errors Components
tAssert	sends a non blocking trigger msg to tassertcatcher
tAssertCatcher	listens to tassert or other die commands in the job retrieves log info from the msg and sends it to the standard talend output
tChronometerStart	starts the calculating the processing time of a subjob
tChronometerStop	stops calculating the processing time of a subjob and displays the gathered info
tdie	sends a trigger msg to tcatcher let the job die once the msg is processed by tcatcher
tFlowMeter	sends a meter msg to tFlowMeterCatcher
tFlowMeterCatcher	listens to flow meter catch option if enabled in the component properties .provides standard log info to the defined output
tLogCatcher	listens to twarm,tDie, or other die commands in the job . retrieves log info from the msg and sends it to a standards talend output
tStatCatcher	listens to stat_catch option if enabled in the components properties and provides standards log info to the defined output
twarn	sends a non blocking trigger msg to tcatcher

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MISC COMPONENTS

tBufferInput read the data stored by tBufferOutput

tBufferOutput buffered data to returns it to a parent job or to a web service client after export

tContextDump dumps the current context to a schema

TcontextLoad loads a context from a stream

tFixedFlowInput creates a fixed flow from a internal values

tMemorizeRows stores the last N rows of the flow to ease their retrieval

tMsgBox display a popup message box

tRowGenerator generates as many rows and fields and needed and feeds each field with a value taken randomly from a provided list

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Orchestration

tFileList iterates on a set of files from a defined directory

tFlowToIterate transforms a flow input link to an iterate

tForEach creates a loopon the list for an iterates links

tInfiniteLoop creates an infinite loop over an iterates link

tIterateToFlow transforms an iterate link to a flow input

tLoop creates a loop for an iterate link

tprejob starts the prejob

tPostjob starts the postJob

tReplicate replicates a row as many times as needed

tRunjob launches another talend job stored in the project

tSleep makes a subjob sleeps at the end of each iteration

tUnite merges input into the same output

tWaitForFile scans a directory and triggers action when specified files are created or deleted

tWaitforSQL scans a directory and triggers action when specified files are created or deleted

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processing_components

tAggregateRow matches SQL groupby feature.receives a flow and aggregates it based on one or more columns .the aggregate key and the relevant result of operations (such as min,max, sum,etc ) are provided for each output line

tAggregateSortedRow matches SQL groupby feature.receives a flow and aggregates it based on one or more columns .the aggregate key and the relevant result of operations (such as min,max, sum,etc ) are provided for each output line

tConvertType converts one talend java type to another

tExternalSortRow sorts and read a sample delimited file

tFilterColumns maps input columns with output columns mapping is based on column names

tFilterRows filter input row by evaluting column conditions

tJoins performs inner and outer join between the main data flow and lookup flow

tMap allows joins column or rows filtering, transformation and multiple outputs

tReplace replaces expression with another one

tSampleRow filters rows according to line numbers

tSortRow sorts data flow,allows advanced sorting capabilities (multi-column sorting ascending/descending sorting,alphabetical sorting)

tXMLMap allows the joins, column, or rows filtering,transformations, and multiple outputs

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processing_Field_components

tDenormalize concatnates different fields into an array or a delimited string

tDenormalizeSortedRow combines in a group all input sorted rows except denormalized ones .distinct values of the denormalized sorted rows are joined with item seperators

tNormalize Normalizations a flat rows with items

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System_components

tRunJob launches another talend job stored in the project

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custom_code_components

tjava allows to enter manually the start java code part of the component

tjavarow allows to enter manually the main java code part of the component

tjavaflex allows to enter manually the start , main, and end java code parts of a components

tSetGlobalVar sets a list of global variables

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data quality

tReplaceList Replace string with a dynamic replacement list

tschemacomplianceCheck checks columns from a schema

tUniqRow makes a data flow unique based on the key set on the schema

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file_management_components

tFileArchive archive the files(a collection of historical documents or records providing information about a place, institution, or group of people)

tFileCompare compares two files and provides comparision data

tfileCopy copies source files into target directories

tFileDelete deletes files from defined directories

tFileExists checks if a file exists or not

tFileList iterates on a set of files from a defined directory

tFileunArchive unarchive a files of any format

tFileTouch creates an empty files

tFileProperties creates a single row flow with file properties

tCreateTemporaryFile create a temporary file

tChangeFileEncoding change encoding of a file

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TECHNICAL COMPONENTS

tHashInput fills a hash buffered as input(Hashing is a technique or process of mapping keys, and values into the hash table by using a hash function)

tHashOutput fills a hash buffered as output(Hashing is a technique or process of mapping keys, and values into the hash table by using a hash function)

MISC COMPONENTS
tBufferInput	read the data stored by tBufferOutput
tBufferOutput	buffered data to returns it to a parent job or to a web service client after export
tContextDump	dumps the current context to a schema
TcontextLoad	loads a context from a stream
tFixedFlowInput	creates a fixed flow from a internal values
tMemorizeRows	stores the last N rows of the flow to ease their retrieval
tMsgBox	display a popup message box
tRowGenerator	generates as many rows and fields and needed and feeds each field with a value taken randomly from a provided list

Orchestration
tFileList	iterates on a set of files from a defined directory
tFlowToIterate	transforms a flow input link to an iterate
tForEach	creates a loopon the list for an iterates links
tInfiniteLoop	creates an infinite loop over an iterates link
tIterateToFlow	transforms an iterate link to a flow input
tLoop	creates a loop for an iterate link
tprejob	starts the prejob
tPostjob	starts the postJob
tReplicate	replicates a row as many times as needed
tRunjob	launches another talend job stored in the project
tSleep	makes a subjob sleeps at the end of each iteration
tUnite	merges input into the same output
tWaitForFile	scans a directory and triggers action when specified files are created or deleted
tWaitforSQL	scans a directory and triggers action when specified files are created or deleted

processing_components
tAggregateRow	matches SQL groupby feature.receives a flow and aggregates it based on one or more columns .the aggregate key and the relevant result of operations (such as min,max, sum,etc ) are provided for each output line
tAggregateSortedRow	matches SQL groupby feature.receives a flow and aggregates it based on one or more columns .the aggregate key and the relevant result of operations (such as min,max, sum,etc ) are provided for each output line
tConvertType	converts one talend java type to another
tExternalSortRow	sorts and read a sample delimited file
tFilterColumns	maps input columns with output columns mapping is based on column names
tFilterRows	filter input row by evaluting column conditions
tJoins	performs inner and outer join between the main data flow and lookup flow
tMap	allows joins column or rows filtering, transformation and multiple outputs
tReplace	replaces expression with another one
tSampleRow	filters rows according to line numbers
tSortRow	sorts data flow,allows advanced sorting capabilities (multi-column sorting ascending/descending sorting,alphabetical sorting)
tXMLMap	allows the joins, column, or rows filtering,transformations, and multiple outputs

processing_Field_components
tDenormalize	concatnates different fields into an array or a delimited string
tDenormalizeSortedRow	combines in a group all input sorted rows except denormalized ones .distinct values of the denormalized sorted rows are joined with item seperators
tNormalize	Normalizations a flat rows with items

System_components
tRunJob	launches another talend job stored in the project

custom_code_components
tjava	allows to enter manually the start java code part of the component
tjavarow	allows to enter manually the main java code part of the component
tjavaflex	allows to enter manually the start , main, and end java code parts of a components
tSetGlobalVar	sets a list of global variables

data quality
tReplaceList	Replace string with a dynamic replacement list
tschemacomplianceCheck	checks columns from a schema
tUniqRow	makes a data flow unique based on the key set on the schema

file_management_components
tFileArchive	archive the files(a collection of historical documents or records providing information about a place, institution, or group of people)
tFileCompare	compares two files and provides comparision data
tfileCopy	copies source files into target directories
tFileDelete	deletes files from defined directories
tFileExists	checks if a file exists or not
tFileList	iterates on a set of files from a defined directory
tFileunArchive	unarchive a files of any format
tFileTouch	creates an empty files
tFileProperties	creates a single row flow with file properties
tCreateTemporaryFile	create a temporary file
tChangeFileEncoding	change encoding of a file

TECHNICAL COMPONENTS
tHashInput	fills a hash buffered as input(Hashing is a technique or process of mapping keys, and values into the hash table by using a hash function)
tHashOutput	fills a hash buffered as output(Hashing is a technique or process of mapping keys, and values into the hash table by using a hash function)

Components_List