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July 15, 2016 23:09
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Custom Property Support in EL Demo for NiFi
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| nifi.custom.variable.1=yes | |
| nifi.custom.variable.2=maam | |
| nifi.custom.attributes.dir=/Users/ydavis/dev/tools/attributes |
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| <?xml version="1.0" encoding="UTF-8" standalone="yes"?><template encoding-version="1.0"><description>This flow demonstrates use of custom properties in EL with UpdateAttributes processor and the PutFile processor</description><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><name>CustomPropertyDemo</name><snippet><connections><id>748758a2-2eb8-42fe-8fc6-d11d467c1e6c</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><backPressureDataSizeThreshold>1 GB</backPressureDataSizeThreshold><backPressureObjectThreshold>10000</backPressureObjectThreshold><destination><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>4045eff6-fafc-4979-9138-b63d465c059a</id><type>PROCESSOR</type></destination><flowFileExpiration>0 sec</flowFileExpiration><labelIndex>1</labelIndex><name></name><selectedRelationships>success</selectedRelationships><source><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>70bb9f9d-0640-4122-bdc4-ce5e95cd27f6</id><type>PROCESSOR</type></source><zIndex>0</zIndex></connections><connections><id>ebac49b8-3b03-40f5-a658-f1034a300656</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><backPressureDataSizeThreshold>1 GB</backPressureDataSizeThreshold><backPressureObjectThreshold>10000</backPressureObjectThreshold><destination><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>cd917fed-fbc3-4d58-9256-3bc21deeaaa0</id><type>PROCESSOR</type></destination><flowFileExpiration>0 sec</flowFileExpiration><labelIndex>1</labelIndex><name></name><selectedRelationships>success</selectedRelationships><source><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>4045eff6-fafc-4979-9138-b63d465c059a</id><type>PROCESSOR</type></source><zIndex>0</zIndex></connections><connections><id>dc85e5e7-564e-4d76-98b1-cd3434f5cc8f</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><backPressureDataSizeThreshold>1 GB</backPressureDataSizeThreshold><backPressureObjectThreshold>10000</backPressureObjectThreshold><destination><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>1aa2f6bc-8236-4592-bbc7-1385fed0f4e9</id><type>PROCESSOR</type></destination><flowFileExpiration>0 sec</flowFileExpiration><labelIndex>1</labelIndex><name></name><selectedRelationships>success</selectedRelationships><source><groupId>53d29129-3b42-40ab-a008-81ebb557b334</groupId><id>cd917fed-fbc3-4d58-9256-3bc21deeaaa0</id><type>PROCESSOR</type></source><zIndex>0</zIndex></connections><processors><id>4045eff6-fafc-4979-9138-b63d465c059a</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><position><x>1003.0298039347335</x><y>156.6821235311313</y></position><config><annotationData><criteria> | |
| <flowFilePolicy>USE_CLONE</flowFilePolicy> | |
| <rules> | |
| <actions> | |
| <attribute>var2</attribute> | |
| <id>a61c8ce1-a531-4862-bd81-ba9b97ac63cd</id> | |
| <value>${flowFileId}</value> | |
| </actions> | |
| <actions> | |
| <attribute>var3</attribute> | |
| <id>0f004dd9-9f27-416d-b0f7-9176e21dc43a</id> | |
| <value>${nifi.system.properties.2}</value> | |
| </actions> | |
| <actions> | |
| <attribute>var1</attribute> | |
| <id>e7082bf2-7608-44cb-bb17-40d4bdaa95a6</id> | |
| <value>${nifi.custom.variable.1}</value> | |
| </actions> | |
| <conditions> | |
| <expression>${nifi.system.properties.1:equals("fake")}</expression> | |
| <id>7e83a780-86bc-4c87-b13d-997e14f19a52</id> | |
| </conditions> | |
| <id>38664ddc-41b7-4daf-9f04-6f4b336cbfd8</id> | |
| <name>Test Attribute</name> | |
| </rules> | |
| </criteria></annotationData><bulletinLevel>WARN</bulletinLevel><comments></comments><concurrentlySchedulableTaskCount>1</concurrentlySchedulableTaskCount><lossTolerant>false</lossTolerant><penaltyDuration>30 sec</penaltyDuration><properties><entry><key>Delete Attributes Expression</key></entry></properties><runDurationMillis>0</runDurationMillis><schedulingPeriod>0 sec</schedulingPeriod><schedulingStrategy>TIMER_DRIVEN</schedulingStrategy><yieldDuration>1 sec</yieldDuration></config><name>UpdateAttribute</name><relationships><autoTerminate>false</autoTerminate><name>success</name></relationships><style/><type>org.apache.nifi.processors.attributes.UpdateAttribute</type></processors><processors><id>cd917fed-fbc3-4d58-9256-3bc21deeaaa0</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><position><x>1172.0298039347335</x><y>632.0221540487095</y></position><config><bulletinLevel>WARN</bulletinLevel><comments></comments><concurrentlySchedulableTaskCount>1</concurrentlySchedulableTaskCount><lossTolerant>false</lossTolerant><penaltyDuration>30 sec</penaltyDuration><properties><entry><key>Attributes List</key><value>var1,var2,var3</value></entry><entry><key>Destination</key><value>flowfile-content</value></entry><entry><key>Include Core Attributes</key><value>true</value></entry><entry><key>Null Value</key><value>false</value></entry></properties><runDurationMillis>0</runDurationMillis><schedulingPeriod>0 sec</schedulingPeriod><schedulingStrategy>TIMER_DRIVEN</schedulingStrategy><yieldDuration>1 sec</yieldDuration></config><name>AttributesToJSON</name><relationships><autoTerminate>true</autoTerminate><name>failure</name></relationships><relationships><autoTerminate>false</autoTerminate><name>success</name></relationships><style/><type>org.apache.nifi.processors.standard.AttributesToJSON</type></processors><processors><id>70bb9f9d-0640-4122-bdc4-ce5e95cd27f6</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><position><x>389.9938542277023</x><y>586.3118928182407</y></position><config><bulletinLevel>WARN</bulletinLevel><comments></comments><concurrentlySchedulableTaskCount>1</concurrentlySchedulableTaskCount><lossTolerant>false</lossTolerant><penaltyDuration>30 sec</penaltyDuration><properties><entry><key>File Size</key><value>100B</value></entry><entry><key>Batch Size</key><value>1</value></entry><entry><key>Data Format</key><value>Text</value></entry><entry><key>Unique FlowFiles</key><value>false</value></entry></properties><runDurationMillis>0</runDurationMillis><schedulingPeriod>30 sec</schedulingPeriod><schedulingStrategy>TIMER_DRIVEN</schedulingStrategy><yieldDuration>1 sec</yieldDuration></config><name>GenerateFlowFile</name><relationships><autoTerminate>false</autoTerminate><name>success</name></relationships><style/><type>org.apache.nifi.processors.standard.GenerateFlowFile</type></processors><processors><id>1aa2f6bc-8236-4592-bbc7-1385fed0f4e9</id><parentGroupId>53d29129-3b42-40ab-a008-81ebb557b334</parentGroupId><position><x>1782.0298039347335</x><y>254.2021235311313</y></position><config><bulletinLevel>WARN</bulletinLevel><comments></comments><concurrentlySchedulableTaskCount>1</concurrentlySchedulableTaskCount><lossTolerant>false</lossTolerant><penaltyDuration>30 sec</penaltyDuration><properties><entry><key>Directory</key><value>${nifi.custom.attributes.dir}</value></entry><entry><key>Conflict Resolution Strategy</key><value>fail</value></entry><entry><key>Create Missing Directories</key><value>true</value></entry><entry><key>Maximum File Count</key></entry><entry><key>Last Modified Time</key></entry><entry><key>Permissions</key></entry><entry><key>Owner</key></entry><entry><key>Group</key></entry></properties><runDurationMillis>0</runDurationMillis><schedulingPeriod>0 sec</schedulingPeriod><schedulingStrategy>TIMER_DRIVEN</schedulingStrategy><yieldDuration>1 sec</yieldDuration></config><name>PutFile</name><relationships><autoTerminate>true</autoTerminate><name>failure</name></relationships><relationships><autoTerminate>true</autoTerminate><name>success</name></relationships><style/><type>org.apache.nifi.processors.standard.PutFile</type></processors></snippet><timestamp>07/15/2016 18:59:09 EDT</timestamp></template> |
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| # ensure this value provided in nifi.properties | |
| nifi.variable.registry.properties=./conf/custom.properties,./conf/system.properties |
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| nifi.system.properties.1=fake | |
| nifi.system.properties.2=test |
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Thanks for the good article. Very informative.
However, I am wondering if there is a way to make Nifi load the custom properties without restarting Nifi.
Thanks
Anil