Add get stored script and delete stored script to high level REST API

client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java

@@ -37,6 +37,8 @@
 import org.elasticsearch.action.admin.cluster.repositories.put.PutRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.repositories.verify.VerifyRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptRequest;
 import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest;
 import org.elasticsearch.action.admin.indices.alias.get.GetAliasesRequest;
 import org.elasticsearch.action.admin.indices.cache.clear.ClearIndicesCacheRequest;
@@ -877,6 +879,18 @@ static Request getTemplates(GetIndexTemplatesRequest getIndexTemplatesRequest) t
         return request;
     }
 
+    static Request getScript(GetStoredScriptRequest getStoredScriptRequest) {
+        String endpoint = new EndpointBuilder().addPathPartAsIs("_scripts").addPathPart(getStoredScriptRequest.id()).build();
+        Request request = new Request(HttpGet.METHOD_NAME, endpoint);
+        return request;
+    }
+
+    static Request deleteScript(DeleteStoredScriptRequest deleteStoredScriptRequest) {
+        String endpoint = new EndpointBuilder().addPathPartAsIs("_scripts").addPathPart(deleteStoredScriptRequest.id()).build();
+        Request request = new Request(HttpDelete.METHOD_NAME, endpoint);
+        return request;
+    }
+
     private static HttpEntity createEntity(ToXContent toXContent, XContentType xContentType) throws IOException {
         BytesRef source = XContentHelper.toXContent(toXContent, xContentType, false).toBytesRef();
         return new ByteArrayEntity(source.bytes, source.offset, source.length, createContentType(xContentType));

client/rest-high-level/src/main/java/org/elasticsearch/client/RestHighLevelClient.java

@@ -26,6 +26,10 @@
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionRequestValidationException;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptResponse;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptResponse;
 import org.elasticsearch.action.bulk.BulkRequest;
 import org.elasticsearch.action.bulk.BulkResponse;
 import org.elasticsearch.action.delete.DeleteRequest;
@@ -652,6 +656,62 @@ public final FieldCapabilitiesResponse fieldCaps(FieldCapabilitiesRequest fieldC
             FieldCapabilitiesResponse::fromXContent, emptySet());
     }
 
+    /**
+     * Get stored script by id.
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html">
+     *     How to use scripts on elastic.co</a>
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return the response
+     * @throws IOException in case there is a problem sending the request or parsing back the response
+     */
+    public GetStoredScriptResponse getStoredScript(GetStoredScriptRequest request, RequestOptions options) throws IOException {
+        return performRequestAndParseEntity(request, RequestConverters::getScript, options,
+            GetStoredScriptResponse::fromXContent, emptySet());
+    }
+
+    /**
+     * Asynchronously get stored script by id.
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html">
+     *     How to use scripts on elastic.co</a>
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @param listener the listener to be notified upon request completion
+     */
+    public void getStoredScriptAsync(GetStoredScriptRequest request, RequestOptions options,
+                                     ActionListener<GetStoredScriptResponse> listener) {
+        performRequestAsyncAndParseEntity(request, RequestConverters::getScript, options,
+            GetStoredScriptResponse::fromXContent, listener, emptySet());
+    }
+
+    /**
+     * Delete stored script by id.
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html">
+     *     How to use scripts on elastic.co</a>
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return the response
+     * @throws IOException in case there is a problem sending the request or parsing back the response
+     */
+    public DeleteStoredScriptResponse deleteStoredScript(DeleteStoredScriptRequest request, RequestOptions options) throws IOException {
+        return performRequestAndParseEntity(request, RequestConverters::deleteScript, options,
+            DeleteStoredScriptResponse::fromXContent, emptySet());
+    }
+
+    /**
+     * Asynchronously delete stored script by id.
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html">
+     *     How to use scripts on elastic.co</a>
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @param listener the listener to be notified upon request completion
+     */
+    public void deleteStoredScriptAsync(DeleteStoredScriptRequest request, RequestOptions options,
+                                        ActionListener<DeleteStoredScriptResponse> listener) {
+        performRequestAsyncAndParseEntity(request, RequestConverters::deleteScript, options,
+            DeleteStoredScriptResponse::fromXContent, listener, emptySet());
+    }
+
     /**
      * Asynchronously executes a request using the Field Capabilities API.
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/search-field-caps.html">Field Capabilities API

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

@@ -37,6 +37,8 @@
 import org.elasticsearch.action.admin.cluster.repositories.put.PutRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.repositories.verify.VerifyRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptRequest;
 import org.elasticsearch.action.admin.indices.alias.Alias;
 import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest;
 import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest.AliasActions;
@@ -1913,6 +1915,26 @@ public void testGetTemplateRequest() throws Exception {
         assertThat(request.getEntity(), nullValue());
     }
 
+    public void testGetScriptRequest() {
+        GetStoredScriptRequest storedScriptRequest = new GetStoredScriptRequest("x-script");
+
+        Request request = RequestConverters.getScript(storedScriptRequest);
+        assertThat(request.getEndpoint(), equalTo("/_scripts/" + storedScriptRequest.id()));
+        assertThat(request.getMethod(), equalTo(HttpGet.METHOD_NAME));
+        assertThat(request.getParameters().isEmpty(), equalTo(true));
+        assertThat(request.getEntity(), nullValue());
+    }
+
+    public void testDeleteScriptRequest() {
+        DeleteStoredScriptRequest storedScriptRequest = new DeleteStoredScriptRequest("x-script");
+
+        Request request = RequestConverters.deleteScript(storedScriptRequest);
+        assertThat(request.getEndpoint(), equalTo("/_scripts/" + storedScriptRequest.id()));
+        assertThat(request.getMethod(), equalTo(HttpDelete.METHOD_NAME));
+        assertThat(request.getParameters().isEmpty(), equalTo(true));
+        assertThat(request.getEntity(), nullValue());
+    }
+
     private static void assertToXContentBody(ToXContent expectedBody, HttpEntity actualEntity) throws IOException {
         BytesReference expectedBytes = XContentHelper.toXContent(expectedBody, REQUEST_BODY_CONTENT_TYPE, false);
         assertEquals(XContentType.JSON.mediaTypeWithoutParameters(), actualEntity.getContentType().getValue());

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

@@ -0,0 +1,102 @@
+package org.elasticsearch.client;/*
+ * 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.
+ */
+
+
+import org.apache.http.entity.ContentType;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.util.EntityUtils;
+import org.elasticsearch.ElasticsearchStatusException;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.DeleteStoredScriptResponse;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptRequest;
+import org.elasticsearch.action.admin.cluster.storedscripts.GetStoredScriptResponse;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ToXContent;
+import org.elasticsearch.common.xcontent.XContentType;
+import org.elasticsearch.rest.RestStatus;
+import org.elasticsearch.script.Script;
+import org.elasticsearch.script.StoredScriptSource;
+
+import java.util.Collections;
+
+import static java.util.Collections.emptyMap;
+import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
+import static org.hamcrest.Matchers.equalTo;
+
+public class StoredScriptsIT extends ESRestHighLevelClientTestCase {
+
+    final String id = "calculate-score";
+
+    public void testGetStoredScript() throws Exception {
+        final StoredScriptSource scriptSource =
+            new StoredScriptSource("painless",
+                "Math.log(_score * 2) + params.my_modifier",
+            Collections.singletonMap(Script.CONTENT_TYPE_OPTION, XContentType.JSON.mediaType()));
+
+        final String script = Strings.toString(scriptSource.toXContent(jsonBuilder(), ToXContent.EMPTY_PARAMS));
+        // TODO: change to HighLevel PutStoredScriptRequest when it will be ready
+        // so far - using low-level REST API
+        Response putResponse =
+            adminClient()
+                .performRequest("PUT", "/_scripts/calculate-score", emptyMap(),
+                    new StringEntity("{\"script\":" + script + "}",
+                        ContentType.APPLICATION_JSON));
+        assertEquals(putResponse.getStatusLine().getReasonPhrase(), 200, putResponse.getStatusLine().getStatusCode());
+        assertEquals("{\"acknowledged\":true}", EntityUtils.toString(putResponse.getEntity()));
+
+        GetStoredScriptRequest getRequest = new GetStoredScriptRequest("calculate-score");
+
+        GetStoredScriptResponse getResponse = execute(getRequest, highLevelClient()::getStoredScript,
+            highLevelClient()::getStoredScriptAsync);
+
+        assertThat(getResponse.getSource(), equalTo(scriptSource));
+    }
+
+    public void testDeleteStoredScript() throws Exception {
+        final StoredScriptSource scriptSource =
+            new StoredScriptSource("painless",
+                "Math.log(_score * 2) + params.my_modifier",
+                Collections.singletonMap(Script.CONTENT_TYPE_OPTION, XContentType.JSON.mediaType()));
+
+        final String script = Strings.toString(scriptSource.toXContent(jsonBuilder(), ToXContent.EMPTY_PARAMS));
+        // TODO: change to HighLevel PutStoredScriptRequest when it will be ready
+        // so far - using low-level REST API
+        Response putResponse =
+            adminClient()
+                .performRequest("PUT", "/_scripts/" + id, emptyMap(),
+                    new StringEntity("{\"script\":" + script + "}",
+                        ContentType.APPLICATION_JSON));
+        assertEquals(putResponse.getStatusLine().getReasonPhrase(), 200, putResponse.getStatusLine().getStatusCode());
+        assertEquals("{\"acknowledged\":true}", EntityUtils.toString(putResponse.getEntity()));
+
+        DeleteStoredScriptRequest deleteRequest = new DeleteStoredScriptRequest(id);
+
+        DeleteStoredScriptResponse deleteResponse = execute(deleteRequest, highLevelClient()::deleteStoredScript,
+            highLevelClient()::deleteStoredScriptAsync);
+
+        assertThat(deleteResponse.isAcknowledged(), equalTo(true));
+
+        GetStoredScriptRequest getRequest = new GetStoredScriptRequest(id);
+
+        final ElasticsearchStatusException statusException = expectThrows(ElasticsearchStatusException.class,
+            () -> execute(getRequest, highLevelClient()::getStoredScript,
+                highLevelClient()::getStoredScriptAsync));
+        assertThat(statusException.status(), equalTo(RestStatus.NOT_FOUND));
+    }
+}