Add HTTP implementation of logs reporting protocol (#7038)

CHANGES.md

@@ -56,6 +56,7 @@ Release Notes.
 * Fix counter misuse in the alarm core. Alarm can't be triggered in time.
 * Events can be configured as alarm source.
 * Make the number of core worker in meter converter thread pool configurable.
+* Add HTTP implementation of logs reporting protocol.
 
 #### UI
 * Add logo for kong plugin.

docs/en/protocols/Log-Data-Protocol.md

@@ -8,7 +8,7 @@ Report `native-proto` format log via gRPC.
 
 [gRPC service define](https://github.com/apache/skywalking-data-collect-protocol/blob/master/logging/Logging.proto)
 
-## Native Json Protocol
+## Native Kafka Protocol
 
 Report `native-json` format log via kafka.
 
@@ -43,3 +43,41 @@ Json log record example:
 }
 ```
 
+## HTTP API
+
+Report `json` format logs via HTTP API, the endpoint is http://<oap-address>:12800/logs.
+
+Json log record example:
+
+```json
+[
+  {
+    "timestamp": 1618161813371,
+    "service": "Your_ApplicationName",
+    "serviceInstance": "3a5b8da5a5ba40c0b192e91b5c80f1a8@192.168.1.8",
+    "traceContext": {
+      "traceId": "ddd92f52207c468e9cd03ddd107cd530.69.16181331190470001",
+      "spanId": "0",
+      "traceSegmentId": "ddd92f52207c468e9cd03ddd107cd530.69.16181331190470000"
+    },
+    "tags": {
+      "data": [
+        {
+          "key": "level",
+          "value": "INFO"
+        },
+        {
+          "key": "logger",
+          "value": "com.example.MyLogger"
+        }
+      ]
+    },
+    "body": {
+      "text": {
+        "text": "log message"
+      }
+    }
+  }
+]
+```
+

oap-server/server-receiver-plugin/skywalking-log-recevier-plugin/src/main/java/org/apache/skywalking/oap/server/recevier/log/provider/LogModuleProvider.java

@@ -20,6 +20,7 @@ package org.apache.skywalking.oap.server.recevier.log.provider;
 import org.apache.skywalking.oap.log.analyzer.module.LogAnalyzerModule;
 import org.apache.skywalking.oap.server.core.CoreModule;
 import org.apache.skywalking.oap.server.core.server.GRPCHandlerRegister;
+import org.apache.skywalking.oap.server.core.server.JettyHandlerRegister;
 import org.apache.skywalking.oap.server.library.module.ModuleConfig;
 import org.apache.skywalking.oap.server.library.module.ModuleDefine;
 import org.apache.skywalking.oap.server.library.module.ModuleProvider;
@@ -27,7 +28,8 @@ import org.apache.skywalking.oap.server.library.module.ModuleStartException;
 import org.apache.skywalking.oap.server.library.module.ServiceNotProvidedException;
 import org.apache.skywalking.oap.server.receiver.sharing.server.SharingServerModule;
 import org.apache.skywalking.oap.server.recevier.log.module.LogModule;
-import org.apache.skywalking.oap.server.recevier.log.provider.handler.LogReportServiceHandler;
+import org.apache.skywalking.oap.server.recevier.log.provider.handler.grpc.LogReportServiceHandler;
+import org.apache.skywalking.oap.server.recevier.log.provider.handler.rest.LogReportServiceRestHandler;
 import org.apache.skywalking.oap.server.telemetry.TelemetryModule;
 
 public class LogModuleProvider extends ModuleProvider {
@@ -59,6 +61,11 @@ public class LogModuleProvider extends ModuleProvider {
                                                               .getService(GRPCHandlerRegister.class);
 
         grpcHandlerRegister.addHandler(new LogReportServiceHandler(getManager()));
+
+        JettyHandlerRegister jettyHandlerRegister = getManager().find(SharingServerModule.NAME)
+                                                                .provider()
+                                                                .getService(JettyHandlerRegister.class);
+        jettyHandlerRegister.addHandler(new LogReportServiceRestHandler(getManager()));
     }
 
     @Override

oap-server/server-receiver-plugin/skywalking-log-recevier-plugin/src/main/java/org/apache/skywalking/oap/server/recevier/log/provider/handler/grpc/LogReportServiceHandler.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.skywalking.oap.server.recevier.log.provider.handler;
+package org.apache.skywalking.oap.server.recevier.log.provider.handler.grpc;
 
 import io.grpc.stub.StreamObserver;
 import lombok.extern.slf4j.Slf4j;

oap-server/server-receiver-plugin/skywalking-log-recevier-plugin/src/main/java/org/apache/skywalking/oap/server/recevier/log/provider/handler/rest/LogReportServiceRestHandler.java

@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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.apache.skywalking.oap.server.recevier.log.provider.handler.rest;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import java.io.BufferedReader;
+import java.util.ArrayList;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.skywalking.apm.network.logging.v3.LogData;
+import org.apache.skywalking.oap.log.analyzer.module.LogAnalyzerModule;
+import org.apache.skywalking.oap.log.analyzer.provider.log.ILogAnalyzerService;
+import org.apache.skywalking.oap.server.library.module.ModuleManager;
+import org.apache.skywalking.oap.server.library.server.jetty.JettyHandler;
+import org.apache.skywalking.oap.server.library.util.ProtoBufJsonUtils;
+import org.apache.skywalking.oap.server.telemetry.TelemetryModule;
+import org.apache.skywalking.oap.server.telemetry.api.CounterMetrics;
+import org.apache.skywalking.oap.server.telemetry.api.HistogramMetrics;
+import org.apache.skywalking.oap.server.telemetry.api.MetricsCreator;
+import org.apache.skywalking.oap.server.telemetry.api.MetricsTag;
+
+@Slf4j
+public class LogReportServiceRestHandler extends JettyHandler {
+    private final Gson gson = new Gson();
+
+    private final HistogramMetrics histogram;
+
+    private final CounterMetrics errorCounter;
+
+    private final ILogAnalyzerService logAnalyzerService;
+
+    public LogReportServiceRestHandler(final ModuleManager moduleManager) {
+        final MetricsCreator metricsCreator = moduleManager.find(TelemetryModule.NAME)
+                                                           .provider()
+                                                           .getService(MetricsCreator.class);
+
+        logAnalyzerService = moduleManager.find(LogAnalyzerModule.NAME)
+                                          .provider()
+                                          .getService(ILogAnalyzerService.class);
+
+        histogram = metricsCreator.createHistogramMetric(
+            "log_in_latency", "The process latency of log",
+            new MetricsTag.Keys("protocol"), new MetricsTag.Values("http")
+        );
+        errorCounter = metricsCreator.createCounter(
+            "log_analysis_error_count", "The error number of log analysis",
+            new MetricsTag.Keys("protocol"), new MetricsTag.Values("http")
+        );
+    }
+
+    @Override
+    protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) {
+        try (final HistogramMetrics.Timer ignored = histogram.createTimer()) {
+            final BufferedReader reader = req.getReader();
+            final StringBuilder content = new StringBuilder();
+            for (String line = reader.readLine(); line != null; line = reader.readLine()) {
+                content.append(line);
+            }
+            final JsonArray array = gson.fromJson(content.toString(), JsonArray.class);
+            final ArrayList<LogData.Builder> logs = new ArrayList<>(array.size());
+            for (final JsonElement it : array) {
+                final LogData.Builder builder = LogData.newBuilder();
+                ProtoBufJsonUtils.fromJSON(it.toString(), builder);
+                logs.add(builder);
+            }
+            logs.forEach(logAnalyzerService::doAnalysis);
+        } catch (final Exception e) {
+            log.error(e.getMessage(), e);
+            errorCounter.inc();
+        }
+    }
+
+    @Override
+    public String pathSpec() {
+        return "/logs";
+    }
+}