Add REST API for ComponentTemplate CRUD

client/rest-high-level/src/test/java/org/elasticsearch/client/RestHighLevelClientTests.java

@@ -790,7 +790,10 @@ public void testApiNamingConventions() throws Exception {
             "indices.get_upgrade",
             "indices.put_alias",
             "render_search_template",
-            "scripts_painless_execute"
+            "scripts_painless_execute",
+            "cluster.put_component_template",
+            "cluster.get_component_template",
+            "cluster.delete_component_template"
         };
         //These API are not required for high-level client feature completeness
         String[] notRequiredApi = new String[] {

distribution/archives/integ-test-zip/build.gradle

@@ -1,3 +1,4 @@
+import org.elasticsearch.gradle.info.BuildParams
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -32,3 +33,9 @@ integTest.runner {
     systemProperty 'tests.logfile', '--external--'
   }
 }
+
+testClusters.integTest {
+  if (BuildParams.isSnapshotBuild() == false) {
+    systemProperty 'es.itv2_feature_flag_registered', 'true'
+  }
+}

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json

@@ -0,0 +1,35 @@
+{
+  "cluster.delete_component_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
+      "description":"Deletes a component template"
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_component_template/{name}",
+          "methods":[
+            "DELETE"
+          ],
+          "parts":{
+            "name":{
+              "type":"string",
+              "description":"The name of the template"
+            }
+          }
+        }
+      ]
+    },
+    "params":{
+      "timeout":{
+        "type":"time",
+        "description":"Explicit operation timeout"
+      },
+      "master_timeout":{
+        "type":"time",
+        "description":"Specify timeout for connection to master"
+      }
+    }
+  }
+}

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json

@@ -0,0 +1,41 @@
+{
+  "cluster.get_component_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
+      "description":"Returns one or more component templates"
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_component_template",
+          "methods":[
+            "GET"
+          ]
+        },
+        {
+          "path":"/_component_template/{name}",
+          "methods":[
+            "GET"
+          ],
+          "parts":{
+            "name":{
+              "type":"list",
+              "description":"The comma separated names of the component templates"
+            }
+          }
+        }
+      ]
+    },
+    "params":{
+      "master_timeout":{
+        "type":"time",
+        "description":"Explicit operation timeout for connection to master node"
+      },
+      "local":{
+        "type":"boolean",
+        "description":"Return local information, do not retrieve the state from master node (default: false)"
+      }
+    }
+  }
+}

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json

@@ -0,0 +1,45 @@
+{
+  "cluster.put_component_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
+      "description":"Creates or updates a component template"
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_component_template/{name}",
+          "methods":[
+            "PUT",
+            "POST"
+          ],
+          "parts":{
+            "name":{
+              "type":"string",
+              "description":"The name of the template"
+            }
+          }
+        }
+      ]
+    },
+    "params":{
+      "create":{
+        "type":"boolean",
+        "description":"Whether the index template should only be added if new or can also replace an existing one",
+        "default":false
+      },
+      "timeout":{
+        "type":"time",
+        "description":"Explicit operation timeout"
+      },
+      "master_timeout":{
+        "type":"time",
+        "description":"Specify timeout for connection to master"
+      }
+    },
+    "body":{
+      "description":"The template definition",
+      "required":true
+    }
+  }
+}

rest-api-spec/src/main/resources/rest-api-spec/test/cluster.component_template/10_basic.yml

@@ -0,0 +1,46 @@
+---
+"Basic CRUD":
+  - skip:
+      version: " - 7.99.99"
+      reason: not backported yet
+
+  - do:
+      cluster.put_component_template:
+        name: test
+        body:
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+            mappings:
+              properties:
+                field:
+                  type: keyword
+            aliases:
+              aliasname: {}
+          version: 2
+          _meta:
+            foo: bar
+            baz:
+              eggplant: true
+
+  - do:
+      cluster.get_component_template:
+        name: test
+
+  - match: {test.version: 2}
+  - match: {test._meta: {foo: bar, baz: {eggplant: true}}}
+  - match: {test.template.settings: {index: {number_of_shards: '1', number_of_replicas: '0'}}}
+  - match: {test.template.mappings: {properties: {field: {type: keyword}}}}
+  - match: {test.template.aliases: {aliasname: {}}}
+
+  - do:
+      cluster.delete_component_template:
+        name: test
+
+  - do:
+      catch: missing
+      cluster.get_component_template:
+        name: test
+
+  - is_false: test

server/src/main/java/org/elasticsearch/action/ActionModule.java

@@ -21,6 +21,7 @@
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.elasticsearch.Build;
 import org.elasticsearch.action.admin.cluster.allocation.ClusterAllocationExplainAction;
 import org.elasticsearch.action.admin.cluster.allocation.TransportClusterAllocationExplainAction;
 import org.elasticsearch.action.admin.cluster.configuration.AddVotingConfigExclusionsAction;
@@ -142,11 +143,17 @@
 import org.elasticsearch.action.admin.indices.shrink.TransportResizeAction;
 import org.elasticsearch.action.admin.indices.stats.IndicesStatsAction;
 import org.elasticsearch.action.admin.indices.stats.TransportIndicesStatsAction;
+import org.elasticsearch.action.admin.indices.template.delete.DeleteComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.delete.DeleteIndexTemplateAction;
+import org.elasticsearch.action.admin.indices.template.delete.TransportDeleteComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.delete.TransportDeleteIndexTemplateAction;
+import org.elasticsearch.action.admin.indices.template.get.GetComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesAction;
+import org.elasticsearch.action.admin.indices.template.get.TransportGetComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.get.TransportGetIndexTemplatesAction;
+import org.elasticsearch.action.admin.indices.template.put.PutComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateAction;
+import org.elasticsearch.action.admin.indices.template.put.TransportPutComponentTemplateAction;
 import org.elasticsearch.action.admin.indices.template.put.TransportPutIndexTemplateAction;
 import org.elasticsearch.action.admin.indices.upgrade.get.TransportUpgradeStatusAction;
 import org.elasticsearch.action.admin.indices.upgrade.get.UpgradeStatusAction;
@@ -269,11 +276,13 @@
 import org.elasticsearch.rest.action.admin.indices.RestClearIndicesCacheAction;
 import org.elasticsearch.rest.action.admin.indices.RestCloseIndexAction;
 import org.elasticsearch.rest.action.admin.indices.RestCreateIndexAction;
+import org.elasticsearch.rest.action.admin.indices.RestDeleteComponentTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestDeleteIndexAction;
 import org.elasticsearch.rest.action.admin.indices.RestDeleteIndexTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestFlushAction;
 import org.elasticsearch.rest.action.admin.indices.RestForceMergeAction;
 import org.elasticsearch.rest.action.admin.indices.RestGetAliasesAction;
+import org.elasticsearch.rest.action.admin.indices.RestGetComponentTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestGetFieldMappingAction;
 import org.elasticsearch.rest.action.admin.indices.RestGetIndexTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestGetIndicesAction;
@@ -286,6 +295,7 @@
 import org.elasticsearch.rest.action.admin.indices.RestIndicesShardStoresAction;
 import org.elasticsearch.rest.action.admin.indices.RestIndicesStatsAction;
 import org.elasticsearch.rest.action.admin.indices.RestOpenIndexAction;
+import org.elasticsearch.rest.action.admin.indices.RestPutComponentTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestPutIndexTemplateAction;
 import org.elasticsearch.rest.action.admin.indices.RestPutMappingAction;
 import org.elasticsearch.rest.action.admin.indices.RestRecoveryAction;
@@ -361,6 +371,23 @@ public class ActionModule extends AbstractModule {
 
     private static final Logger logger = LogManager.getLogger(ActionModule.class);
 
+    private static final boolean ITV2_FEATURE_FLAG_REGISTERED;
+
+    static {
+        final String property = System.getProperty("es.itv2_feature_flag_registered");
+        if (Build.CURRENT.isSnapshot() && property != null) {
+            throw new IllegalArgumentException("es.itv2_feature_flag_registered is only supported in non-snapshot builds");
+        }
+        if (Build.CURRENT.isSnapshot() || "true".equals(property)) {
+            ITV2_FEATURE_FLAG_REGISTERED = true;
+        } else if ("false".equals(property) || property == null) {
+            ITV2_FEATURE_FLAG_REGISTERED = false;
+        } else {
+            throw new IllegalArgumentException("expected es.itv2_feature_flag_registered to be unset, true, or false but was [" +
+                property + "]");
+        }
+    }
+
     private final Settings settings;
     private final IndexNameExpressionResolver indexNameExpressionResolver;
     private final IndexScopedSettings indexScopedSettings;
@@ -486,6 +513,11 @@ public <Request extends ActionRequest, Response extends ActionResponse> void reg
         actions.register(PutIndexTemplateAction.INSTANCE, TransportPutIndexTemplateAction.class);
         actions.register(GetIndexTemplatesAction.INSTANCE, TransportGetIndexTemplatesAction.class);
         actions.register(DeleteIndexTemplateAction.INSTANCE, TransportDeleteIndexTemplateAction.class);
+        if (ITV2_FEATURE_FLAG_REGISTERED) {
+            actions.register(PutComponentTemplateAction.INSTANCE, TransportPutComponentTemplateAction.class);
+            actions.register(GetComponentTemplateAction.INSTANCE, TransportGetComponentTemplateAction.class);
+            actions.register(DeleteComponentTemplateAction.INSTANCE, TransportDeleteComponentTemplateAction.class);
+        }
         actions.register(ValidateQueryAction.INSTANCE, TransportValidateQueryAction.class);
         actions.register(RefreshAction.INSTANCE, TransportRefreshAction.class);
         actions.register(FlushAction.INSTANCE, TransportFlushAction.class);
@@ -621,6 +653,11 @@ public void initRestHandlers(Supplier<DiscoveryNodes> nodesInCluster) {
         registerHandler.accept(new RestGetIndexTemplateAction());
         registerHandler.accept(new RestPutIndexTemplateAction());
         registerHandler.accept(new RestDeleteIndexTemplateAction());
+        if (ITV2_FEATURE_FLAG_REGISTERED) {
+            registerHandler.accept(new RestPutComponentTemplateAction());
+            registerHandler.accept(new RestGetComponentTemplateAction());
+            registerHandler.accept(new RestDeleteComponentTemplateAction());
+        }
 
         registerHandler.accept(new RestPutMappingAction());
         registerHandler.accept(new RestGetMappingAction());

server/src/main/java/org/elasticsearch/action/admin/indices/template/delete/DeleteComponentTemplateAction.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.action.admin.indices.template.delete;
+
+import org.elasticsearch.action.ActionType;
+import org.elasticsearch.action.support.master.AcknowledgedResponse;
+
+public class DeleteComponentTemplateAction extends ActionType<AcknowledgedResponse> {
+
+    public static final DeleteComponentTemplateAction INSTANCE = new DeleteComponentTemplateAction();
+    public static final String NAME = "cluster:admin/component_template/delete";
+
+    private DeleteComponentTemplateAction() {
+        super(NAME, AcknowledgedResponse::new);
+    }
+
+}