Replace "master" terminology in Java APIs #1684

tlfeng · 2021-12-09T00:23:53Z

Is your feature request related to a problem? Please describe.
Replace the "master" terminology in all Java APIs, including field, method, class, and package names.
The "Java APIs" refers to those packaged in Java libraries and are published to Maven (https://search.maven.org/search?q=g:org.opensearch https://mvnrepository.com/artifact/org.opensearch)

Impact:
All plugins, clients and tools that use OpenSearch Java APIs from OpenSearch Java libraries which contain non-inclusive terminologies have to make corresponding changes to call new APIs, if they want to upgrade the dependency to a future major version of OpenSearch.

A part of #472

Describe the solution you'd like
Replace the "master" terminology with "ClusterManager" in all Java APIs that are exposed in Java libraries.

Overall solution: #1684 (comment)
Sub-issue:

Describe alternatives you've considered
None.

Additional context
Locations of "master" in API of Java library:
These libraries have been published to Maven. (Links: https://mvnrepository.com/artifact/org.opensearch https://search.maven.org/search?q=g:org.opensearch)

server
1 package org.opensearch.action.support.master
https://opensearch.org/javadocs/1.1.0/OpenSearch/server/build/docs/javadoc/org/opensearch/action/support/master/package-summary.html
(totally 1 package, the package contains 15 Java classes)
2 class org.opensearch.cluster.MasterNodeChangePredicate
https://opensearch.org/javadocs/2.0.0/OpenSearch/server/build/docs/javadoc/org/opensearch/cluster/MasterNodeChangePredicate.html
(totally 14 classes)
3 variable org.opensearch.action.support.master.MasterNodeRequest.DEFAULT_MASTER_NODE_TIMEOUT
https://opensearch.org/javadocs/1.1.0/OpenSearch/server/build/docs/javadoc/org/opensearch/action/support/master/MasterNodeRequest.html#DEFAULT_MASTER_NODE_TIMEOUT
(totally 15 variables)
4 method org.opensearch.cluster.node.DiscoveryNodes.Builder.masterNodeId(String)
https://opensearch.org/javadocs/2.0.0/OpenSearch/server/build/docs/javadoc/org/opensearch/cluster/node/DiscoveryNodes.Builder.html#masterNodeId(java.lang.String)
... (In version 1.1.0, totally 177 methods) (In version 2.0.0, totally 142 methods)

Java Low Level REST Client
1 variable org.opensearch.client.NodeSelector.SKIP_DEDICATED_MASTERS
https://opensearch.org/javadocs/1.1.0/OpenSearch/client/rest/build/docs/javadoc/org/opensearch/client/NodeSelector.html#SKIP_DEDICATED_MASTERS
(totally 1 variable)
2 method org.opensearch.client.Node.Roles.isMasterEligible()
https://opensearch.org/javadocs/1.1.0/OpenSearch/client/rest/build/docs/javadoc/org/opensearch/client/Node.Roles.html#isMasterEligible()
(totally 1 method)

Java High Level REST Client
1 variable org.opensearch.client.TimedRequest.DEFAULT_MASTER_NODE_TIMEOUT
https://opensearch.org/javadocs/1.1.0/OpenSearch/client/rest-high-level/build/docs/javadoc/org/opensearch/client/TimedRequest.html#DEFAULT_MASTER_NODE_TIMEOUT
(totally 1 variable)
2 method org.opensearch.client.TimedRequest.masterNodeTimeout()
https://opensearch.org/javadocs/2.0.0/OpenSearch/client/rest-high-level/build/docs/javadoc/org/opensearch/client/TimedRequest.html#masterNodeTimeout()
(totally 11 methods)

Test Framework
1 class org.opensearch.test.disruption.BlockMasterServiceOnMaster
https://opensearch.org/javadocs/2.0.0/OpenSearch/test/framework/build/docs/javadoc/org/opensearch/test/disruption/BlockMasterServiceOnMaster.html
(totally 3 classes)
2 variable org.opensearch.test.InternalTestCluster.DEFAULT_HIGH_NUM_MASTER_NODES
https://opensearch.org/javadocs/2.0.0/OpenSearch/test/framework/build/docs/javadoc/org/opensearch/test/InternalTestCluster.html#DEFAULT_HIGH_NUM_MASTER_NODES
(totally 4 variables)
3 method org.opensearch.client.Client.masterClient()
https://opensearch.org/javadocs/2.0.0/OpenSearch/test/framework/build/docs/javadoc/org/opensearch/test/InternalTestCluster.html#masterClient()
(totally 41 methods)

The text was updated successfully, but these errors were encountered:

tlfeng · 2022-06-03T03:09:40Z

The plan to resolve the issue:

Result:

On 2.x branch:

There are deprecation notice to all public and protected class/method/variable names in the code, which contain "master" terminology. It includes
a. @Deprecated annotation
b. @deprecated tag in Javadoc, @deprecated As of 2.1, because supporting inclusive language, replaced by {@link <new_class>#<new_method>}
There are alternative package/class/method/variable that "master" is replaced by "cluster manager" in the name.

On main branch:

The "master" word is replaced by "cluster manager" in all public and protected class/method/variable names.

Implementation:
On main branch, and for each public and protected class/method/variable which contains "master" terminology,

Copy the codes of definition.
Replace "master" word with "cluster manager" in its name. This is done by the Rename refactoring feature of IntelliJ IDEA, so that both the definition and reference can be renamed.
Paste the original codes of the definition aside.
Add @Deprecated annotation and @deprecated tag in Javadoc
Remove all the existing implementation in the old class or method, to keep the old usage for the deprecated classes and methods while only maintain the new renamed classes and methods.
For class, make the old class extends the new renamed class.
For package, apply the class change to all classes in the package.
For method, call the new renamed method in the old method.
If the renamed class has unit test, copy the unit test to test the deprecated class.
Backport all the changes to 2.x branch.
Remove all the deprecated class/method/variable.

Note:

No new test will be added.
The deprecation and renaming should be done in the order of "package -> class -> method and variable", so that the new package or class will have no deprecated class or method, which makes the code clean.
The class/method/variable that used for maintaining the compatibility of "master" usage in REST APIs and settings will not be deprecated or renamed.
The deprecation notice in the code will be added from the next minor version (2.1), and the deprecated items will be removed in next major version (3.0).

Appendix
The regex to filter the lines of code with public Java API contains "master" terminology:
class: (public|protected)(.)+(class|interface)\s(\w)*Master
method: (public|protected)(.)+[Mm]aster(\w)*\(
variable: (public|protected)(.)+(MASTER|master)(.)*=

Renaming rule:

variable name:
master -> clusterManager
MASTER -> CLUSTER_MANAGER
method name:
master -> clusterManager
Master -> ClusterManager
class/package name:
Master-> ClusterManager

…ManagerService' (#4022) To support inclusive language, the `master` terminology is going to be replaced by `cluster manager` in the code base. - Deprecate class `MasterService` and create alternative class `ClusterManagerService`. - Add a unit test to validate the method `ClusterService.getMasterService()` can still return an object in type `MasterService`. - Rename all the existing references of `MasterService` to `ClusterManagerService`, and rename the local variable names. - Deprecate public methods `ClusterServiceUtils.createMasterService(...)` and create alternative methods `createClusterManagerService(...)` Note: The class `ClusterManagerService` is a subclass of `MasterService`, the inheritance relationship is opposite from most of the other classes with `Master` in the name (that covered by issue #1684). The reason is: There is a public method that has return value in type `MasterService`, https://github.com/opensearch-project/OpenSearch/blob/388c80ad94529b1d9aad0a735c4740dce2932a32/server/src/main/java/org/opensearch/cluster/service/ClusterService.java#L221 And in the code for Performance Analyzer plugin, there is a local variable in type `MasterService`: https://github.com/opensearch-project/performance-analyzer/blob/5ee4809ac1cda6517ed871aeb12c6635203e7f1d/src/main/java/org/opensearch/performanceanalyzer/collectors/MasterServiceEventMetrics.java#L219 If making the old class `MasterService` a subclass of the new class `ClusterManagerService`, the above usage will be broken. Reversing the inheritance relationship, I'm able to keep the backwards compatibility of the method `getMasterService()` while deprecating the class `MasterService` and encourage using a new class `ClusterManagerService`. Signed-off-by: Tianli Feng <ftianli@amazon.com>

…ManagerService' (#4022) To support inclusive language, the `master` terminology is going to be replaced by `cluster manager` in the code base. - Deprecate class `MasterService` and create alternative class `ClusterManagerService`. - Add a unit test to validate the method `ClusterService.getMasterService()` can still return an object in type `MasterService`. - Rename all the existing references of `MasterService` to `ClusterManagerService`, and rename the local variable names. - Deprecate public methods `ClusterServiceUtils.createMasterService(...)` and create alternative methods `createClusterManagerService(...)` Note: The class `ClusterManagerService` is a subclass of `MasterService`, the inheritance relationship is opposite from most of the other classes with `Master` in the name (that covered by issue #1684). The reason is: There is a public method that has return value in type `MasterService`, https://github.com/opensearch-project/OpenSearch/blob/388c80ad94529b1d9aad0a735c4740dce2932a32/server/src/main/java/org/opensearch/cluster/service/ClusterService.java#L221 And in the code for Performance Analyzer plugin, there is a local variable in type `MasterService`: https://github.com/opensearch-project/performance-analyzer/blob/5ee4809ac1cda6517ed871aeb12c6635203e7f1d/src/main/java/org/opensearch/performanceanalyzer/collectors/MasterServiceEventMetrics.java#L219 If making the old class `MasterService` a subclass of the new class `ClusterManagerService`, the above usage will be broken. Reversing the inheritance relationship, I'm able to keep the backwards compatibility of the method `getMasterService()` while deprecating the class `MasterService` and encourage using a new class `ClusterManagerService`. Signed-off-by: Tianli Feng <ftianli@amazon.com> (cherry picked from commit 740f75d)

…ManagerService' (#4022) (#4050) To support inclusive language, the `master` terminology is going to be replaced by `cluster manager` in the code base. - Deprecate class `MasterService` and create alternative class `ClusterManagerService`. - Add a unit test to validate the method `ClusterService.getMasterService()` can still return an object in type `MasterService`. - Rename all the existing references of `MasterService` to `ClusterManagerService`, and rename the local variable names. - Deprecate public methods `ClusterServiceUtils.createMasterService(...)` and create alternative methods `createClusterManagerService(...)` Note: The class `ClusterManagerService` is a subclass of `MasterService`, the inheritance relationship is opposite from most of the other classes with `Master` in the name (that covered by issue #1684). The reason is: There is a public method that has return value in type `MasterService`, https://github.com/opensearch-project/OpenSearch/blob/388c80ad94529b1d9aad0a735c4740dce2932a32/server/src/main/java/org/opensearch/cluster/service/ClusterService.java#L221 And in the code for Performance Analyzer plugin, there is a local variable in type `MasterService`: https://github.com/opensearch-project/performance-analyzer/blob/5ee4809ac1cda6517ed871aeb12c6635203e7f1d/src/main/java/org/opensearch/performanceanalyzer/collectors/MasterServiceEventMetrics.java#L219 If making the old class `MasterService` a subclass of the new class `ClusterManagerService`, the above usage will be broken. Reversing the inheritance relationship, I'm able to keep the backwards compatibility of the method `getMasterService()` while deprecating the class `MasterService` and encourage using a new class `ClusterManagerService`. Signed-off-by: Tianli Feng <ftianli@amazon.com> (cherry picked from commit 740f75d)

tlfeng added enhancement Enhancement or improvement to existing feature or request untriaged >breaking Identifies a breaking change. and removed untriaged labels Dec 9, 2021

tlfeng mentioned this issue Dec 9, 2021

Change the "Master" nomenclature #472

Closed

12 tasks

This was referenced Apr 18, 2022

Deprecate the "Master" nomenclature opensearch-project/anomaly-detection#397

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Change the "Master" nomenclature opensearch-project/asynchronous-search#99

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Deprecate the "Master" nomenclature opensearch-project/k-NN#307

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bowenlan-amzn mentioned this issue Apr 18, 2022

Deprecate the "Master" nomenclature opensearch-project/index-management#285

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4 tasks

tlfeng mentioned this issue Apr 19, 2022

Change the "Master" nomenclature opensearch-project/sql#463

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1 task

tlfeng mentioned this issue May 2, 2022

Rename reserved node id '_must_join_elected_master_' to '_must_join_elected_cluster_manager_' that used by in DetachClusterCommand #3116

Merged

5 tasks

tlfeng added the v3.0.0 Issues and PRs related to version 3.0.0 label May 13, 2022

This was referenced May 16, 2022

Replace internal usages of 'master' term in 'server/src/test' directory #2520

Merged

Replace internal usages of 'master' term in 'server/src/internalClusterTest' directory #2521

Merged

tlfeng mentioned this issue Jun 8, 2022

List of deprecated code removal in 3.0 #2773

Open

19 tasks

tlfeng added the Meta Meta issue, not directly linked to a PR label Jun 8, 2022

tlfeng mentioned this issue Jun 16, 2022

Deprecate the "Master" nomenclature opensearch-project/security#1664

Closed

cliu123 mentioned this issue Jun 16, 2022

Rename the usages of OpenSearch core Java API containing "Master" nomenclature opensearch-project/security#1887

Closed

tlfeng mentioned this issue Jun 21, 2022

Deprecate public methods and variables with master term in package 'org.opensearch.action.support.master' #3617

Merged

5 tasks

tlfeng mentioned this issue Jul 27, 2022

Deprecate class 'MasterService' and create alternative class 'ClusterManagerService' #4022

Merged

5 tasks

peternied mentioned this issue Oct 20, 2022

[BUG] Remove package org.opensearch.action.support.master #4856

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Replace "master" terminology in Java APIs #1684

Replace "master" terminology in Java APIs #1684

tlfeng commented Dec 9, 2021 •

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tlfeng commented Jun 3, 2022 •

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Replace "master" terminology in Java APIs #1684

Replace "master" terminology in Java APIs #1684

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tlfeng commented Dec 9, 2021 • edited Loading

tlfeng commented Jun 3, 2022 • edited Loading

The plan to resolve the issue:

tlfeng commented Dec 9, 2021 •

edited

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tlfeng commented Jun 3, 2022 •

edited

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