Add REST APIs for IndexTemplateV2Metadata CRUD

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

@@ -801,7 +801,9 @@ public void testApiNamingConventions() throws Exception {
             "cluster.delete_component_template",
             "indices.create_data_stream",
             "indices.get_data_streams",
-            "indices.delete_data_stream"
+            "indices.delete_data_stream",
+            "indices.put_index_template",
+            "indices.delete_index_template"
         };
         //These API are not required for high-level client feature completeness
         String[] notRequiredApi = new String[] {

rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json

@@ -0,0 +1,35 @@
+{
+  "indices.delete_index_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
+      "description":"Deletes an index template."
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_index_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/indices.get_index_template.json

@@ -0,0 +1,45 @@
+{
+  "indices.get_index_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
+      "description":"Returns an index template."
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_index_template",
+          "methods":[
+            "GET"
+          ]
+        },
+        {
+          "path":"/_index_template/{name}",
+          "methods":[
+            "GET"
+          ],
+          "parts":{
+            "name":{
+              "type":"list",
+              "description":"The comma separated names of the index templates"
+            }
+          }
+        }
+      ]
+    },
+    "params":{
+      "flat_settings":{
+        "type":"boolean",
+        "description":"Return settings in flat format (default: false)"
+      },
+      "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/indices.put_index_template.json

@@ -0,0 +1,45 @@
+{
+  "indices.put_index_template":{
+    "documentation":{
+      "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
+      "description":"Creates or updates an index template."
+    },
+    "stability":"stable",
+    "url":{
+      "paths":[
+        {
+          "path":"/_index_template/{name}",
+          "methods":[
+            "PUT",
+            "POST"
+          ],
+          "parts":{
+            "name":{
+              "type":"string",
+              "description":"The name of the template"
+            }
+          }
+        }
+      ]
+    },
+    "params":{
+      "order":{
+        "type":"number",
+        "description":"The order for this template when merging multiple matching ones (higher numbers are merged later, overriding the lower numbers)"
+      },
+      "create":{
+        "type":"boolean",
+        "description":"Whether the index template should only be added if new or can also replace an existing one",
+        "default":false
+      },
+      "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/indices.get_index_template/10_basic.yml

@@ -0,0 +1,66 @@
+setup:
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.put_index_template:
+        name: test
+        body:
+          index_patterns: test-*
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+            mappings:
+              properties:
+                field:
+                  type: keyword
+
+---
+"Get index template":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.get_index_template:
+        name: test
+
+  - match: {index_templates.0.name: test}
+  - match: {index_templates.0.index_template.index_patterns: ["test-*"]}
+  - match: {index_templates.0.index_template.template.settings: {index: {number_of_shards: '1', number_of_replicas: '0'}}}
+  - match: {index_templates.0.index_template.template.mappings: {properties: {field: {type: keyword}}}}
+
+---
+"Get all tindex emplates":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.put_index_template:
+        name: test2
+        body:
+          index_patterns: test2-*
+          template:
+            settings:
+              number_of_shards:   1
+
+  - do:
+      indices.get_index_template: {}
+
+  - length: {index_templates: 2}
+
+---
+"Get index template with local flag":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.get_index_template:
+        name: test
+        local: true
+
+  - match: {index_templates.0.name: test}

rest-api-spec/src/main/resources/rest-api-spec/test/indices.get_index_template/20_get_missing.yml

@@ -0,0 +1,20 @@
+setup:
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.delete_index_template:
+        name:   '*'
+        ignore: 404
+---
+"Get missing template":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      catch:  missing
+      indices.get_index_template:
+        name: test
+

rest-api-spec/src/main/resources/rest-api-spec/test/indices.put_index_template/10_basic.yml

@@ -0,0 +1,112 @@
+---
+"Put index template":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.put_index_template:
+        name: test
+        body:
+          index_patterns: test-*
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+            mappings:
+              properties:
+                field:
+                  type: keyword
+
+  - do:
+      indices.get_index_template:
+        name: test
+
+  - match: {index_templates.0.name: "test"}
+  - match: {index_templates.0.index_template.index_patterns: ["test-*"]}
+  - match: {index_templates.0.index_template.template.settings.index: {number_of_shards: '1', number_of_replicas: '0'}}
+  - match: {index_templates.0.index_template.template.mappings: {properties: {field: {type: keyword}}}}
+
+---
+"Put multiple index templates":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.put_index_template:
+        name: test
+        body:
+          index_patterns: [test-*, test2-*]
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+            mappings:
+              properties:
+                field:
+                  type: text
+            aliases:
+              test_alias: {}
+              test_blias: { routing: b }
+              test_clias: { filter: { term: { user: kimchy }}}
+
+  - do:
+      indices.get_index_template:
+        name: test
+
+  - match: {index_templates.0.index_template.index_patterns: ["test-*", "test2-*"]}
+  - match: {index_templates.0.index_template.template.settings.index: {number_of_shards: '1', number_of_replicas: '0'}}
+  - match: {index_templates.0.index_template.template.mappings: {properties: {field: {type: text}}}}
+  - length: {index_templates.0.index_template.template.aliases: 3}
+  - is_true: index_templates.0.index_template.template.aliases.test_alias
+  - match: {index_templates.0.index_template.template.aliases.test_blias.index_routing: "b" }
+  - match: {index_templates.0.index_template.template.aliases.test_blias.search_routing: "b" }
+  - match: {index_templates.0.index_template.template.aliases.test_clias.filter.term.user: "kimchy" }
+
+---
+"Put index template with 'create' flag":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      indices.put_index_template:
+        name: test2
+        body:
+          index_patterns: test-*
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+
+  - do:
+      indices.get_index_template:
+        name: test2
+
+  - match: {index_templates.0.index_template.index_patterns: ["test-*"]}
+  - match: {index_templates.0.index_template.template.settings.index: {number_of_shards: '1', number_of_replicas: '0'}}
+
+  - do:
+      catch: bad_request
+      indices.put_index_template:
+        name: test2
+        create: true
+        body:
+          index_patterns: test-*
+          template:
+            settings:
+              number_of_shards:   1
+              number_of_replicas: 0
+
+---
+"Put index template without index_patterns":
+  - skip:
+      version: " - 7.99.99"
+      reason: "index template v2 API has not been backported"
+
+  - do:
+      catch: bad_request
+      indices.put_index_template:
+        name: test
+        body: {}