OpenSearch API source implementation

Signed-off-by: Souvik Bose <souvik04in@gmail.com>

data-prepper-plugins/armeria-common/src/main/java/org/opensearch/dataprepper/HttpRequestExceptionHandler.java

@@ -69,6 +69,9 @@ private HttpStatus handleException(final Throwable e) {
         } else if (e instanceof SizeOverflowException) {
             requestsTooLargeCounter.increment();
             return HttpStatus.REQUEST_ENTITY_TOO_LARGE;
+        } else if (e instanceof IllegalArgumentException) {
+            badRequestsCounter.increment();
+            return HttpStatus.BAD_REQUEST;
         }
 
         internalServerErrorCounter.increment();

data-prepper-plugins/http-source-common/src/main/java/org/opensearch/dataprepper/http/codec/MultiLineJsonCodec.java

@@ -0,0 +1,41 @@
+package org.opensearch.dataprepper.http.codec;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.linecorp.armeria.common.HttpData;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public class MultiLineJsonCodec implements Codec<List<Map<String, Object>>>  {
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+    private static final String REGEX = "\\r?\\n";
+    private static final TypeReference<Map<String, Object>> MAP_TYPE_REFERENCE =
+            new TypeReference<Map<String, Object>>() {};
+
+    @Override
+    public List<Map<String, Object>> parse(HttpData httpData) throws IOException {
+        List<Map<String, Object>> jsonListData = new ArrayList<>();
+
+        String requestBody = new String(httpData.toInputStream().readAllBytes(), StandardCharsets.UTF_8);
+        List<String> jsonLines = Arrays.asList(requestBody.split(REGEX));
+
+        for (String jsonLine: jsonLines) {
+            if (isInvalidLine(jsonLine)) {
+                throw new IOException("Error processing request payload.");
+            }
+            jsonListData.add(objectMapper.readValue(jsonLine, MAP_TYPE_REFERENCE));
+        }
+        return jsonListData;
+    }
+
+    private static boolean isInvalidLine(final String str) {
+        return str == null || str.isEmpty() || str.isBlank();
+    }
+}

data-prepper-plugins/http-source-common/src/test/java/org/opensearch/dataprepper/http/codec/MultiLineJsonCodecTest.java

@@ -0,0 +1,86 @@
+package org.opensearch.dataprepper.http.codec;
+
+import com.linecorp.armeria.common.HttpData;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class MultiLineJsonCodecTest {
+    private final HttpData serializedRequest = HttpData.ofUtf8("" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }");
+
+    private final HttpData serializedRequestMultipleRows = HttpData.ofUtf8("" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }\n" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }\n" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }\n" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }\n" +
+            "{ \"index\": { \"_index\": \"test-index\", \"_id\": \"id1\" } }\n" +
+            "{ \"text\": \"text1\", \"year\": \"2013\" }\n");
+
+    private final HttpData serializedRequestBad = HttpData.ofUtf8("{}\n\n{}");
+    private final HttpData serializedRequestBadWithBlanks = HttpData.ofUtf8("{}\n   \n    ");
+    private final HttpData serializedRequestBadWithWhiteSpaces = HttpData.ofUtf8("\t\n\r\f {}");
+    private final HttpData serializedRequestBadEmpty = HttpData.ofUtf8("");
+    private final HttpData serializedRequestBadEmptyNewLines = HttpData.ofUtf8("\n\n\n\n\n\n\n     \n");
+    private final HttpData serializedRequestBadInvalidJson = HttpData.ofUtf8("{\"text\":");
+
+    private final MultiLineJsonCodec multiLineJsonCodec = new MultiLineJsonCodec();
+
+    @Test
+    public void testParseSuccess() throws IOException {
+        // When
+        List<Map<String, Object>> res = multiLineJsonCodec.parse(serializedRequest);
+
+        // Then
+        assertEquals(2, res.size());
+        assertEquals(res.get(0).containsKey("index"), true);
+        Map<String, Object> innerMap = (Map<String, Object>) res.get(0).get("index");
+        assertEquals(innerMap.get("_index"), "test-index");
+        assertEquals(innerMap.get("_id"), "id1");
+        assertEquals(res.get(1).containsKey("text"), true);
+        assertEquals(res.get(1).get("text"), "text1");
+        assertEquals(res.get(1).get("year"), "2013");
+    }
+
+    @Test
+    public void testParseSuccess2() throws IOException {
+        // When
+        List<Map<String, Object>> res = multiLineJsonCodec.parse(serializedRequestMultipleRows);
+
+
+        // Then
+        assertEquals(10, res.size());
+
+        for (int idx = 0; idx < res.size() - 1; idx++) {
+            assertEquals(res.get(idx).containsKey("index"), true);
+            Map<String, Object> innerMap = (Map<String, Object>) res.get(idx).get("index");
+            assertEquals(innerMap.get("_index"), "test-index");
+            assertEquals(innerMap.get("_id"), "id1");
+            assertEquals(res.get(idx+1).containsKey("text"), true);
+            assertEquals(res.get(idx+1).get("text"), "text1");
+            assertEquals(res.get(idx+1).get("year"), "2013");
+            idx++;
+        }
+    }
+
+    @Test
+    public void testParseFailure() {
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBad));
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBadEmpty));
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBadEmptyNewLines));
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBadInvalidJson));
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBadWithBlanks));
+        assertThrows(IOException.class, () -> multiLineJsonCodec.parse(serializedRequestBadWithWhiteSpaces));
+    }
+
+}

data-prepper-plugins/http-source/src/test/java/org/opensearch/dataprepper/plugins/source/loghttp/HTTPSourceConfigTest.java

@@ -21,6 +21,5 @@ void testDefault() {
         assertEquals(HTTPSourceConfig.DEFAULT_LOG_INGEST_URI, sourceConfig.getPath());
         assertEquals(HTTPSourceConfig.DEFAULT_PORT, sourceConfig.getDefaultPort());
         assertEquals(HTTPSourceConfig.DEFAULT_LOG_INGEST_URI, sourceConfig.getDefaultPath());
-
     }
 }

data-prepper-plugins/opensearch-api-source/README.md

@@ -0,0 +1,129 @@
+# OpenSearch API Source
+
+This is a source plugin that supports HTTP protocol. It supports [OpenSearch Bulk Document API](https://opensearch.org/docs/latest/api-reference/document-apis/bulk/). All the paths and HTTP methods for [Bulk API operation](https://opensearch.org/docs/latest/api-reference/document-apis/bulk/#path-and-http-methods) are supported. It will also support optional [bulk URL parameters](https://opensearch.org/docs/latest/api-reference/document-apis/bulk/#url-parameters).
+
+## Usages
+To get started with OpenSearch API source, create the following `pipeline.yaml` configuration:
+```yaml
+source:
+   opensearch_api:
+```
+
+### Response status
+
+* `200`: the request data has been successfully written into the buffer.
+* `400`: the request data is either in mal-format or unsupported codec.
+* `408`: the request data fails to be written into the buffer within the timeout.
+* `413`: the request data size is larger than the configured capacity.
+* `429`: the request has been rejected due to the OpenSearch API source executor being in full capacity.
+
+## Configurations
+
+* port (Optional) => An `int` between 0 and 65535 represents the port source is running on. Default is ```9202```.
+* path (Optional) => A `string` which represents the URI path for endpoint invocation. It should start with `/` and length should be at least 1. Path can contain `${pipelineName}` placeholder which will be replaced with pipeline name. Default value is `/opensearch`.
+* health_check_service (Optional) => A `boolean` that determines if a `/health` endpoint on the defined port will be home to a health check. Default is `false`
+* unauthenticated_health_check (Optional) => A `boolean` that determines if the health endpoint will require authentication. This option is ignored if no authentication is defined. Default is `false`
+* request_timeout (Optional) => An `int` larger than 0 represents request timeout in millis. Default is ```10_000```. 
+* thread_count (Optional) => An `int` larger than 0 represents the number of threads to keep in the ScheduledThreadPool. Default is `200`.
+* max_connection_count (Optional) => An `int` larger than 0 represents the maximum allowed number of open connections. Default is `500`.
+* max_pending_requests (Optional) => An `int` larger than 0 represents the maximum allowed number of tasks in the ScheduledThreadPool work queue. Default is `1024`.
+* authentication (Optional) => An authentication configuration. By default, this runs an unauthenticated server. See below for more information.
+* compression (Optional) : The compression type applied on the client request payload. Defaults to `none`. Supported values are: 
+  * `none`: no compression 
+  * `gzip`: apply GZip de-compression on the incoming request.
+
+### Authentication Configurations
+
+By default, the OpenSearch API source input is unauthenticated.
+
+The following is an example of how to run the server with HTTP Basic authentication:
+
+```yaml
+source:
+  opensearch_api:
+    authentication:
+      http_basic:
+        username: my-user
+        password: my_s3cr3t
+```
+
+You can also explicitly disable authentication with:
+
+```yaml
+source:
+  opensearch_api:
+    authentication:
+      unauthenticated:
+```
+
+This plugin uses pluggable authentication for HTTP servers. To provide custom authentication,
+create a plugin which implements [`ArmeriaHttpAuthenticationProvider`](../armeria-common/src/main/java/org/opensearch/dataprepper/armeria/authentication/ArmeriaHttpAuthenticationProvider.java)
+
+
+### SSL
+
+* ssl(Optional) => A `boolean` that enables TLS/SSL. Default is ```false```.
+* ssl_certificate_file(Optional) => A `String` that represents the SSL certificate chain file path or AWS S3 path. S3 path example `s3://<bucketName>/<path>`. Required if `ssl` is set to `true` and `use_acm_certificate_for_ssl` is set to `false`.
+* ssl_key_file(Optional) => A `String` that represents the SSL key file path or AWS S3 path. S3 path example `s3://<bucketName>/<path>`. Only decrypted key file is supported. Required if `ssl` is set to `true` and `use_acm_certificate_for_ssl` is set to `false`.
+* use_acm_certificate_for_ssl(Optional) : A `boolean` that enables TLS/SSL using certificate and private key from AWS Certificate Manager (ACM). Default is `false`.
+* acm_certificate_arn(Optional) : A `String` that represents the ACM certificate ARN. ACM certificate take preference over S3 or local file system certificate. Required if `use_acm_certificate_for_ssl` is set to `true`.
+* acm_private_key_password(Optional): A `String` that represents the ACM private key password which that will be used to decrypt the private key. If it's not provided, a random password will be generated.
+* acm_certificate_timeout_millis(Optional) : An `int` that represents the timeout in milliseconds for ACM to get certificates. Default value is `120000`.
+* aws_region(Optional) : A `String` that represents the AWS region to use `ACM`, `S3`. Required if `use_acm_certificate_for_ssl` is set to `true` or `ssl_certificate_file` and `ssl_key_file` is `AWS S3`.
+
+### Example to enable SSL using OpenSSL
+
+Create the following OpenSearch API source configuration in your `pipeline.yaml`.
+
+```yaml
+source:
+  opensearch_api:
+       ssl: true
+       ssl_certificate_file: "/full/path/to/certfile.crt"
+       ssl_key_file: "/full/path/to/keyfile.key"
+```
+
+Generate a private key named `keyfile.key`, along with a self-signed certificate file named `certfile.crt`.
+
+```
+openssl req  -nodes -new -x509  -keyout keyfile.key -out certfile.crt -subj "/L=test/O=Example Com Inc./OU=Example Com Inc. Root CA/CN=Example Com Inc. Root CA"
+```
+
+Make sure to replace the paths for the `ssl_certificate_file` and `ssl_key_file` for the OpenSearch API source configuration with the actual paths of the files.
+
+- Use the following command to send a sample index action on the Bulk API request by setting the index `index = movies` in the body of the request. 
+
+```
+curl -k -XPOST -H "Content-Type: application/json" -d '{ "index": { "_index": "movies", "_id": "tt1979320" } }
+{ "title": "Rush", "year": 2013}' 
+http://localhost:9202/opensearch/_bulk
+```
+
+- Alternatively, use the following command to set the index `index = movies` in the path 
+```
+curl -k -XPOST -H "Content-Type: application/json" -d '{ "index": { "_index": "movies", "_id": "tt1979320" } }
+{ "title": "Rush", "year": 2013}' 
+http://localhost:9202/opensearch/movies/_bulk
+```
+
+# Metrics
+
+### Counter
+- `requestsReceived`: measures total number of requests received by `/opensearch` endpoint.
+- `requestsRejected`: measures total number of requests rejected (429 response status code) by OpenSearch API source plugin.
+- `successRequests`: measures total number of requests successfully processed (200 response status code) by OpenSearch API source plugin.
+- `badRequests`: measures total number of requests with invalid content type or format processed by OpenSearch API source plugin (400 response status code).
+- `requestTimeouts`: measures total number of requests that time out in the OpenSearch API source server (415 response status code).
+- `requestsTooLarge`: measures total number of requests of which the events size in the content is larger than the buffer capacity (413 response status code).
+- `internalServerError`: measures total number of requests processed by the OpenSearch API source with custom exception type (500 response status code).
+
+### Timer
+- `requestProcessDuration`: measures latency of requests processed by the OpenSearch API source plugin in seconds. 
+
+### Distribution Summary
+- `payloadSize`: measures the distribution of incoming requests payload sizes in bytes.
+
+## Developer Guide
+This plugin is compatible with Java 14. See 
+- [CONTRIBUTING](https://github.com/opensearch-project/data-prepper/blob/main/CONTRIBUTING.md) 
+- [monitoring](https://github.com/opensearch-project/data-prepper/blob/main/docs/monitoring.md)

data-prepper-plugins/opensearch-api-source/build.gradle

@@ -0,0 +1,38 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+plugins {
+    id 'java'
+}
+
+dependencies {
+    implementation project(':data-prepper-api')
+    implementation project(':data-prepper-plugins:blocking-buffer')
+    implementation project(':data-prepper-plugins:http-source-common')
+    implementation project(':data-prepper-plugins:common')
+    implementation project(':data-prepper-plugins:armeria-common')
+    implementation libs.armeria.core
+    implementation libs.commons.io
+    implementation 'software.amazon.awssdk:acm'
+    implementation 'software.amazon.awssdk:s3'
+    implementation 'software.amazon.awssdk:apache-client'
+    testImplementation project(':data-prepper-test-common')
+    testImplementation project(':data-prepper-api').sourceSets.test.output
+    testImplementation 'org.assertj:assertj-core:3.25.3'
+    testImplementation testLibs.mockito.inline
+    compileOnly 'org.projectlombok:lombok:1.18.20'
+    annotationProcessor 'org.projectlombok:lombok:1.18.20'
+}
+
+jacocoTestCoverageVerification {
+    dependsOn jacocoTestReport
+    violationRules {
+        rule { //in addition to core projects rule
+            limit {
+                minimum = 0.90
+            }
+        }
+    }
+}