Add an ISMV3 compatible HTTP source. (#165)

Author: vjkoskela

src/main/java/com/arpnetworking/http/Routes.java

@@ -42,6 +42,7 @@
 import com.arpnetworking.metrics.Units;
 import com.arpnetworking.metrics.common.sources.ClientHttpSourceV1;
 import com.arpnetworking.metrics.common.sources.ClientHttpSourceV2;
+import com.arpnetworking.metrics.common.sources.ClientHttpSourceV3;
 import com.arpnetworking.metrics.common.sources.CollectdHttpSourceV1;
 import com.arpnetworking.metrics.common.sources.PrometheusHttpSource;
 import com.arpnetworking.metrics.incubator.PeriodicMetrics;
@@ -217,6 +218,8 @@ private CompletionStage<HttpResponse> process(final HttpRequest request) {
         } else if (Objects.equals(HttpMethods.POST, request.method())) {
             if (Objects.equals(path, COLLECTD_V1_SOURCE_PREFIX)) {
                 return dispatchHttpRequest(request, ACTOR_COLLECTD_V1);
+            } else if (Objects.equals(path, APP_V3_SOURCE_PREFIX)) {
+                return dispatchHttpRequest(request, ACTOR_APP_V3);
             } else if (Objects.equals(path, APP_V2_SOURCE_PREFIX)) {
                 return dispatchHttpRequest(request, ACTOR_APP_V2);
             } else if (Objects.equals(path, APP_V1_SOURCE_PREFIX)) {
@@ -350,10 +353,12 @@ private String createMetricName(final HttpRequest request, final String actionPa
     private static final String COLLECTD_V1_SOURCE_PREFIX = "/metrics/v1/collectd";
     private static final String APP_V1_SOURCE_PREFIX = "/metrics/v1/application";
     private static final String APP_V2_SOURCE_PREFIX = "/metrics/v2/application";
+    private static final String APP_V3_SOURCE_PREFIX = "/metrics/v3/application";
     private static final String PROMETHEUS_SOURCE_PREFIX = "/metrics/prometheus";
     private static final String ACTOR_COLLECTD_V1 = "/user/" + CollectdHttpSourceV1.ACTOR_NAME;
     private static final String ACTOR_APP_V1 = "/user/" + ClientHttpSourceV1.ACTOR_NAME;
     private static final String ACTOR_APP_V2 = "/user/" + ClientHttpSourceV2.ACTOR_NAME;
+    private static final String ACTOR_APP_V3 = "/user/" + ClientHttpSourceV3.ACTOR_NAME;
     private static final String ACTOR_PROMETHEUS = "/user/" + PrometheusHttpSource.ACTOR_NAME;
     private static final String REST_SERVICE_METRIC_ROOT = "rest_service/";
     private static final String BODY_SIZE_METRIC = "body_size";

src/main/java/com/arpnetworking/metrics/common/sources/ClientHttpSourceV3.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019 Dropbox
+ *
+ * Licensed 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 com.arpnetworking.metrics.common.sources;
+
+import com.arpnetworking.metrics.mad.parsers.ProtobufV3ToRecordParser;
+
+/**
+ * Processes HTTP requests from the metrics client, extracts data and emits metrics.
+ *
+ * @author Ville Koskela (ville dot koskela at inscopemetrics dot io)
+ */
+public final class ClientHttpSourceV3 extends HttpSource {
+
+    /**
+     * Protected constructor.
+     *
+     * @param builder Instance of {@link Builder}.
+     */
+    private ClientHttpSourceV3(final Builder builder) {
+        super(builder);
+    }
+
+    /**
+     * Name of the actor created to receive the HTTP Posts.
+     */
+    public static final String ACTOR_NAME = "appv3";
+
+    /**
+     * ClientHttpSourceV3 {@link BaseSource.Builder} implementation.
+     *
+     * @author Ville Koskela (ville dot koskela at inscopemetrics dot io)
+     */
+    public static final class Builder extends HttpSource.Builder<Builder, ClientHttpSourceV3> {
+        /**
+         * Public constructor.
+         */
+        public Builder() {
+            super(ClientHttpSourceV3::new);
+            setActorName(ACTOR_NAME);
+            setParser(new ProtobufV3ToRecordParser());
+        }
+
+        @Override
+        protected Builder self() {
+            return this;
+        }
+    }
+
+}