NIFI-14777 Restore capability from NiFi 1.x to view upstream/downstre…

[markobean]

…am connections. View connections > upstream/downstream is available in the context menu from a variety of components: input/output ports, processors, process groups, remote process groups and funnels.

Summary

In NiFi 1.x, there was a context menu option for View Connections > upstream/downstream. This is available from any component, but it is particularly useful for input/output ports. The reason is that the connections to ports are not visible on the graph at the same level as the ports themselves. The user must go to the parent process group, and then there is ambiguity which connections are connected to which ports in cases where there are multiple connections and ports on the process group.

A key feature of the View Connections table is that each item in the table is clickable and will navigate to the selected component or connection.

Restoring this feature makes it far easier to navigate the graph and identify complex routing/connectivity issues in the flow.

NIFI-14777

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000
• Pull request contains commits signed with a registered key indicating Verified status

Pull Request Formatting

• Pull Request based on current revision of the main branch
• Pull Request refers to a feature branch with one commit containing changes

Verification

Verification was performed by interacting with the graph and testing a variety of scenarios including:

• viewing connections from processors, input/output ports, process groups, remote process groups and funnels
• disabling access to upstream and downstream connected components via access policies
• renaming connected components to verify the View Connections table is updated similarly
• clicking on each item in the View Connections table navigates to the selected component or connection

Build

• Build completed using ./mvnw clean install -P contrib-check
  • JDK 21
  • JDK 25

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files

[Freedom9339]

I tested the functionality of this and it looks good. The pop up window shows accurate connections and the buttons redirect to the appropriate component. I would suggest using different Icons for the context menu options so that the arrows are pointing up and down, to correspond with "Upstream" and "Downstream". Maybe slanted up/down arrows? Just a thought.

[markobean]

I tested the functionality of this and it looks good. The pop up window shows accurate connections and the buttons redirect to the appropriate component. I would suggest using different Icons for the context menu options so that the arrows are pointing up and down, to correspond with "Upstream" and "Downstream". Maybe slanted up/down arrows? Just a thought.

Thanks @Freedom9339. I updated the arrows, as suggested. The upstream context menu item shows an arrow pointing up and to the left, and downstream shows down and to the right. It's slightly more intuitive and looks good.