Improvement dump function in scheduler

Former-commit-id: f073c39e5cd16f919f3a7320ae5821a2ccfe6d6c

CHANGELOG.md

@@ -6,6 +6,8 @@ Please mark all change in change log and use the ticket from JIRA.
 
 ## Bug
 ## Improvement
+- \#64 - Improvement dump function in scheduler
+
 ## Feature
 ## Task
 

NOTICE.md

@@ -26,4 +26,5 @@
 | gperftools    | [BSD 3-Clause](https://github.com/gperftools/gperftools/blob/master/COPYING)                                                 |
 | grpc          | [Apache 2.0](https://github.com/grpc/grpc/blob/master/LICENSE)                                                   |
 | EASYLOGGINGPP | [MIT](https://github.com/zuhd-org/easyloggingpp/blob/master/LICENSEhttps://github.com/zuhd-org/easyloggingpp/blob/master/LICENSE)                                                          |
+| Json          | [MIT](https://github.com/nlohmann/json/blob/develop/LICENSE.MIT)                                                          |
 

core/src/scheduler/TaskTable.cpp

@@ -52,19 +52,13 @@ ToString(TaskTableItemState state) {
     }
 }
 
-std::string
-ToString(const TaskTimestamp& timestamp) {
-    std::stringstream ss;
-    ss << "<start=" << timestamp.start;
-    ss << ", load=" << timestamp.load;
-    ss << ", loaded=" << timestamp.loaded;
-    ss << ", execute=" << timestamp.execute;
-    ss << ", executed=" << timestamp.executed;
-    ss << ", move=" << timestamp.move;
-    ss << ", moved=" << timestamp.moved;
-    ss << ", finish=" << timestamp.finish;
-    ss << ">";
-    return ss.str();
+json
+TaskTimestamp::Dump() {
+    json ret{
+        {"start", start},       {"load", load}, {"loaded", loaded}, {"execute", execute},
+        {"executed", executed}, {"move", move}, {"moved", moved},   {"finish", finish},
+    };
+    return ret;
 }
 
 bool
@@ -146,15 +140,15 @@ TaskTableItem::Moved() {
     return false;
 }
 
-std::string
+json
 TaskTableItem::Dump() {
-    std::stringstream ss;
-    ss << "<id=" << id;
-    ss << ", task=" << task;
-    ss << ", state=" << ToString(state);
-    ss << ", timestamp=" << ToString(timestamp);
-    ss << ">";
-    return ss.str();
+    json ret{
+        {"id", id},
+        {"task", (int64_t)task.get()},
+        {"state", ToString(state)},
+        {"timestamp", timestamp.Dump()},
+    };
+    return ret;
 }
 
 std::vector<uint64_t>
@@ -268,13 +262,13 @@ TaskTable::Get(uint64_t index) {
 ////        table_.erase(table_.begin(), iterator);
 //}
 
-std::string
+json
 TaskTable::Dump() {
-    std::stringstream ss;
+    json ret;
     for (auto& item : table_) {
-        ss << item->Dump() << std::endl;
+        ret.push_back(item->Dump());
     }
-    return ss.str();
+    return ret;
 }
 
 }  // namespace scheduler

core/src/scheduler/TaskTable.h

@@ -26,6 +26,7 @@
 #include <vector>
 
 #include "event/Event.h"
+#include "interface/interfaces.h"
 #include "task/SearchTask.h"
 
 namespace milvus {
@@ -42,7 +43,7 @@ enum class TaskTableItemState {
     MOVED,      // moved, termination state
 };
 
-struct TaskTimestamp {
+struct TaskTimestamp : public interface::dumpable {
     uint64_t start = 0;
     uint64_t move = 0;
     uint64_t moved = 0;
@@ -51,9 +52,12 @@ struct TaskTimestamp {
     uint64_t execute = 0;
     uint64_t executed = 0;
     uint64_t finish = 0;
+
+    json
+    Dump() override;
 };
 
-struct TaskTableItem {
+struct TaskTableItem : public interface::dumpable {
     TaskTableItem() : id(0), task(nullptr), state(TaskTableItemState::INVALID), mutex() {
     }
 
@@ -87,13 +91,13 @@ struct TaskTableItem {
     bool
     Moved();
 
-    std::string
-    Dump();
+    json
+    Dump() override;
 };
 
 using TaskTableItemPtr = std::shared_ptr<TaskTableItem>;
 
-class TaskTable {
+class TaskTable : public interface::dumpable {
  public:
     TaskTable() = default;
 
@@ -240,8 +244,8 @@ class TaskTable {
     /*
      * Dump;
      */
-    std::string
-    Dump();
+    json
+    Dump() override;
 
  private:
     std::uint64_t id_ = 0;

core/src/scheduler/interface/interfaces.h

+// 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.
+#pragma once
+
+#include <condition_variable>
+#include <deque>
+#include <list>
+#include <memory>
+#include <mutex>
+#include <queue>
+#include <string>
+#include <thread>
+#include <unordered_map>
+#include <vector>
+
+#include "utils/Json.h"
+
+namespace milvus {
+namespace interface {
+
+struct dumpable {
+    virtual ~dumpable() {
+    }
+
+    virtual json
+    Dump() = 0;
+};
+
+}  // namespace interface
+}  // namespace milvus

core/src/utils/Json.h

+// 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.
+#pragma once
+
+#include "external/nlohmann/json.hpp"
+
+namespace milvus {
+using json = nlohmann::json;
+}