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NIFI accessing Content Claim Identifier using Groovy
NiFi-1.0.0 GetFile relatedMethod for collecting user input within NiFi topologynifi error flow not working unless two files in queueWrite attributes to a file in Apache NiFiNifi record the maximum timestampHow to pass json object as parameter to java method(supplied as a jar i ExecuteScript) from groovy in Nifi?Process nifi flow files present in incoming queue, all togetherApache-NiFi DetectDuplicate processor counterwhy nifi is loosing flowfile content?Nifi Processor gets triggered twice for single Input flow file
I need to generate a unique id each time my process runs. My process starts with GetSFTP processor.
I was thinking of using flowfile's Content Claim Identifier for this purpose.
How do access this using Groovy? Thanks in advance!
Flow File
apache-nifi
asked Mar 7 at 1:18
Chris CChris C
65
add a comment |
I need to generate a unique id each time my process runs. My process starts with GetSFTP processor.
I was thinking of using flowfile's Content Claim Identifier for this purpose.
How do access this using Groovy? Thanks in advance!
Flow File
apache-nifi
asked Mar 7 at 1:18
Chris CChris C
65
add a comment |
I need to generate a unique id each time my process runs. My process starts with GetSFTP processor.
I was thinking of using flowfile's Content Claim Identifier for this purpose.
How do access this using Groovy? Thanks in advance!
Flow File
apache-nifi
asked Mar 7 at 1:18
Chris CChris C
65
I need to generate a unique id each time my process runs. My process starts with GetSFTP processor.
I was thinking of using flowfile's Content Claim Identifier for this purpose.
How do access this using Groovy? Thanks in advance!
Flow File
apache-nifi
apache-nifi
asked Mar 7 at 1:18
Chris CChris C
65
asked Mar 7 at 1:18
Chris CChris C
65
asked Mar 7 at 1:18
Chris CChris C
65
asked Mar 7 at 1:18
Chris CChris C
65
asked Mar 7 at 1:18
Chris CChris C
65
65
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
In general, you can depend on the flowfile uuid attribute being unique. Each flowfile in the system generates this on creation, so the flowfiles coming from GetSFTP will have this attribute populated and unique. To access the uuid attribute from Groovy (in a script or custom processor), use the code flowfile.uuid or flowfile.getAttribute('uuid').
The content claim identifier is definitely not unique -- it is a reference to a specific location on the file system (or other storage media if configured) referencing the content bytes of the flowfile. Many flowfiles can have the same content claim identifier.
You can also generate a unique identifier using the UUID() function in Apache NiFi Expression Language and put this in an attribute or content as needed using interpolation (i.e. $UUID()).
answered Mar 7 at 4:56
AndyAndy
8,26512449
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
add a comment |
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In general, you can depend on the flowfile uuid attribute being unique. Each flowfile in the system generates this on creation, so the flowfiles coming from GetSFTP will have this attribute populated and unique. To access the uuid attribute from Groovy (in a script or custom processor), use the code flowfile.uuid or flowfile.getAttribute('uuid').
The content claim identifier is definitely not unique -- it is a reference to a specific location on the file system (or other storage media if configured) referencing the content bytes of the flowfile. Many flowfiles can have the same content claim identifier.
You can also generate a unique identifier using the UUID() function in Apache NiFi Expression Language and put this in an attribute or content as needed using interpolation (i.e. $UUID()).
answered Mar 7 at 4:56
AndyAndy
8,26512449
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
add a comment |
In general, you can depend on the flowfile uuid attribute being unique. Each flowfile in the system generates this on creation, so the flowfiles coming from GetSFTP will have this attribute populated and unique. To access the uuid attribute from Groovy (in a script or custom processor), use the code flowfile.uuid or flowfile.getAttribute('uuid').
The content claim identifier is definitely not unique -- it is a reference to a specific location on the file system (or other storage media if configured) referencing the content bytes of the flowfile. Many flowfiles can have the same content claim identifier.
You can also generate a unique identifier using the UUID() function in Apache NiFi Expression Language and put this in an attribute or content as needed using interpolation (i.e. $UUID()).
answered Mar 7 at 4:56
AndyAndy
8,26512449
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
add a comment |
In general, you can depend on the flowfile uuid attribute being unique. Each flowfile in the system generates this on creation, so the flowfiles coming from GetSFTP will have this attribute populated and unique. To access the uuid attribute from Groovy (in a script or custom processor), use the code flowfile.uuid or flowfile.getAttribute('uuid').
The content claim identifier is definitely not unique -- it is a reference to a specific location on the file system (or other storage media if configured) referencing the content bytes of the flowfile. Many flowfiles can have the same content claim identifier.
You can also generate a unique identifier using the UUID() function in Apache NiFi Expression Language and put this in an attribute or content as needed using interpolation (i.e. $UUID()).
answered Mar 7 at 4:56
AndyAndy
8,26512449
In general, you can depend on the flowfile uuid attribute being unique. Each flowfile in the system generates this on creation, so the flowfiles coming from GetSFTP will have this attribute populated and unique. To access the uuid attribute from Groovy (in a script or custom processor), use the code flowfile.uuid or flowfile.getAttribute('uuid').
The content claim identifier is definitely not unique -- it is a reference to a specific location on the file system (or other storage media if configured) referencing the content bytes of the flowfile. Many flowfiles can have the same content claim identifier.
You can also generate a unique identifier using the UUID() function in Apache NiFi Expression Language and put this in an attribute or content as needed using interpolation (i.e. $UUID()).
answered Mar 7 at 4:56
AndyAndy
8,26512449
answered Mar 7 at 4:56
AndyAndy
8,26512449
answered Mar 7 at 4:56
AndyAndy
8,26512449
answered Mar 7 at 4:56
AndyAndy
8,26512449
8,26512449
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
add a comment |
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
I added a property called myId with the value $UUID() as suggested. But it gives me the following error: 'Myid' validated against '$UUID()' is invalid because 'Myid' is not a supported property or has no Validator associated with it.
– Chris C
Mar 7 at 9:19
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
Also, the reason I can't use flowfile.uuid is because my GetSFTP can contain many flowfiles, but I am looking for a unique id every time my template is run.
– Chris C
Mar 7 at 9:30
add a comment |
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