[GitHub] [skywalking] hanahmily commented on a diff in pull request #8725: Add data-generator module to run OAP in testing mode, generating mock data for testing

[GitBox <gi...@apache.org>]

hanahmily commented on code in PR #8725:
URL: https://github.com/apache/skywalking/pull/8725#discussion_r847827955


##########
oap-server/server-tools/data-generator/src/main/java/org/apache/skywalking/restapi/SegmentGeneratorHandler.java:
##########
@@ -0,0 +1,124 @@
+/*
+ * 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.restapi;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+import java.util.function.IntConsumer;
+import java.util.stream.IntStream;
+import com.linecorp.armeria.common.HttpResponse;
+import com.linecorp.armeria.common.HttpStatus;
+import com.linecorp.armeria.common.MediaType;
+import com.linecorp.armeria.common.util.EventLoopGroups;
+import com.linecorp.armeria.server.annotation.Default;
+import com.linecorp.armeria.server.annotation.Delete;
+import com.linecorp.armeria.server.annotation.Get;
+import com.linecorp.armeria.server.annotation.Param;
+import com.linecorp.armeria.server.annotation.Post;
+import com.linecorp.armeria.server.annotation.ProducesJson;
+import com.linecorp.armeria.server.annotation.RequestObject;
+import org.apache.skywalking.oap.server.core.CoreModule;
+import org.apache.skywalking.oap.server.core.source.Segment;
+import org.apache.skywalking.oap.server.core.source.SourceReceiver;
+import org.apache.skywalking.oap.server.library.module.ModuleManager;
+import io.netty.channel.EventLoopGroup;
+import io.netty.util.concurrent.Future;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class SegmentGeneratorHandler {
+    private final SourceReceiver sourceReceiver;
+    private final Map<String, Future<?>> futures = new ConcurrentHashMap<>();
+    private final EventLoopGroup eventLoopGroup = EventLoopGroups.newEventLoopGroup(10);
+
+    public SegmentGeneratorHandler(ModuleManager manager) {
+        sourceReceiver = manager.find(CoreModule.NAME).provider().getService(SourceReceiver.class);
+    }
+
+    @Post("/mock-data/segments/tasks")
+    public HttpResponse generateMockSegments(
+        @Default("0") @Param("size") int size,
+        @Default("0") @Param("qps") int qps,
+        @RequestObject SegmentRequest request) {
+
+        if (size > 0 && qps > 0) {
+            return HttpResponse.of(
+                HttpStatus.BAD_REQUEST,
+                MediaType.PLAIN_TEXT,
+                "size and qps can't be both set");
+        }
+        log.info("Generate {} mock segments, qps: {}, template: {}", size, qps, request);
+
+        final IntConsumer generator = unused -> {
+            final Segment segment = request.next();
+            log.debug("Generating segment: {}", segment);
+            sourceReceiver.receive(segment);
+        };
+        final String requestId = UUID.randomUUID().toString();
+        final Future<?> future;
+        if (size > 0) {
+            future = eventLoopGroup.submit(() -> IntStream
+                .range(0, size)
+                .forEach(generator));
+        } else {
+            future = eventLoopGroup.scheduleAtFixedRate(() -> IntStream
+                .range(0, qps)
+                .forEach(generator), 0, 1, TimeUnit.SECONDS);
+        }
+
+        futures.put(requestId, future);
+
+        future.addListener(f -> {
+            if (f.isDone()) {
+                futures.remove(requestId);
+                log.info("Generate mock segments finished: {}, requestId: {}", f.isSuccess(),
+                    requestId);
+            }
+            if (f.cause() != null) {
+                log.error(f.cause().getMessage(), f.cause());
+            }
+        });
+
+        return HttpResponse.of(MediaType.PLAIN_TEXT, requestId);
+    }
+
+    @Delete("/mock-data/segments/tasks")
+    public HttpResponse cancelRequest(@Param("requestId") String requestId) {
+        final Future<?> future = futures.get(requestId);
+        if (future == null) {
+            return HttpResponse.of(
+                HttpStatus.NOT_FOUND,
+                MediaType.PLAIN_TEXT_UTF_8,
+                "No such request: %s", requestId);
+        }
+        log.info("Cancelling request: {}", requestId);
+        future.cancel(true);
+        return HttpResponse.of(HttpStatus.OK);
+    }
+
+    @ProducesJson
+    @Get("/mock-data/segments/tasks")

Review Comment:
   all right. `running` and `error` are out. Let's focus on the `total` now



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