Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/interop/stress_interop_client.h

Index: third_party/grpc/test/cpp/interop/stress_interop_client.h
diff --git a/third_party/grpc/test/cpp/interop/stress_interop_client.h b/third_party/grpc/test/cpp/interop/stress_interop_client.h
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+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *is % allowed in string
+ */
+
+#ifndef GRPC_TEST_CPP_STRESS_INTEROP_CLIENT_H
+#define GRPC_TEST_CPP_STRESS_INTEROP_CLIENT_H
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <grpc++/create_channel.h>
+
+#include "test/cpp/interop/interop_client.h"
+#include "test/cpp/util/metrics_server.h"
+
+namespace grpc {
+namespace testing {
+
+using std::pair;
+using std::vector;
+
+// TODO(sreek): Add more test cases here in future
+enum TestCaseType {
+  UNKNOWN_TEST = -1,
+  EMPTY_UNARY = 0,
+  LARGE_UNARY = 1,
+  LARGE_COMPRESSED_UNARY = 2,
+  CLIENT_STREAMING = 3,
+  SERVER_STREAMING = 4,
+  EMPTY_STREAM = 5
+};
+
+const vector<pair<TestCaseType, grpc::string>> kTestCaseList = {
+    {EMPTY_UNARY, "empty_unary"},
+    {LARGE_UNARY, "large_unary"},
+    {LARGE_COMPRESSED_UNARY, "large_compressed_unary"},
+    {CLIENT_STREAMING, "client_streaming"},
+    {SERVER_STREAMING, "server_streaming"},
+    {EMPTY_STREAM, "empty_stream"}};
+
+class WeightedRandomTestSelector {
+ public:
+  // Takes a vector of <test_case, weight> pairs as the input
+  WeightedRandomTestSelector(const vector<pair<TestCaseType, int>>& tests);
+
+  // Returns a weighted-randomly chosen test case based on the test cases and
+  // weights passed in the constructor
+  TestCaseType GetNextTest() const;
+
+ private:
+  const vector<pair<TestCaseType, int>> tests_;
+  int total_weight_;
+};
+
+class StressTestInteropClient {
+ public:
+  StressTestInteropClient(int test_id, const grpc::string& server_address,
+                          std::shared_ptr<Channel> channel,
+                          const WeightedRandomTestSelector& test_selector,
+                          long test_duration_secs, long sleep_duration_ms,
+                          long metrics_collection_interval_secs);
+
+  // The main function. Use this as the thread entry point.
+  // qps_gauge is the Gauge to record the requests per second metric
+  void MainLoop(std::shared_ptr<Gauge> qps_gauge);
+
+ private:
+  void RunTest(TestCaseType test_case);
+
+  int test_id_;
+  const grpc::string& server_address_;
+  std::shared_ptr<Channel> channel_;
+  std::unique_ptr<InteropClient> interop_client_;
+  const WeightedRandomTestSelector& test_selector_;
+  long test_duration_secs_;
+  long sleep_duration_ms_;
+  long metrics_collection_interval_secs_;
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPC_TEST_CPP_STRESS_INTEROP_CLIENT_H