| // 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. |
| |
| #include "kudu/util/rolling_log.h" |
| |
| #include <unistd.h> |
| |
| #include <algorithm> |
| #include <cstdint> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include <glog/stl_logging.h> |
| #include <gtest/gtest.h> |
| |
| #include "kudu/gutil/port.h" |
| #include "kudu/gutil/strings/stringpiece.h" |
| #include "kudu/gutil/strings/substitute.h" |
| #include "kudu/gutil/strings/util.h" |
| #include "kudu/util/env.h" |
| #include "kudu/util/faststring.h" |
| #include "kudu/util/path_util.h" |
| #include "kudu/util/test_macros.h" |
| #include "kudu/util/test_util.h" |
| |
| using std::string; |
| using std::vector; |
| using strings::Substitute; |
| |
| namespace kudu { |
| |
| class RollingLogTest : public KuduTest { |
| public: |
| RollingLogTest() |
| : log_dir_(GetTestPath("log_dir")) { |
| } |
| |
| virtual void SetUp() OVERRIDE { |
| ASSERT_OK(env_->CreateDir(log_dir_)); |
| } |
| |
| protected: |
| void AssertLogCount(int expected_count, vector<string>* children) { |
| vector<string> dir_entries; |
| ASSERT_OK(env_->GetChildren(log_dir_, &dir_entries)); |
| children->clear(); |
| |
| for (const string& child : dir_entries) { |
| if (child == "." || child == "..") continue; |
| children->push_back(child); |
| ASSERT_TRUE(HasPrefixString(child, "rolling_log-test.")); |
| ASSERT_STR_CONTAINS(child, ".mylog."); |
| |
| string pid_suffix = Substitute("$0", getpid()); |
| ASSERT_TRUE(HasSuffixString(child, pid_suffix) || |
| HasSuffixString(child, pid_suffix + ".gz")) << "bad child: " << child; |
| } |
| std::sort(children->begin(), children->end()); |
| ASSERT_EQ(children->size(), expected_count) << *children; |
| } |
| |
| const string log_dir_; |
| }; |
| |
| // Test with compression off. |
| TEST_F(RollingLogTest, TestLog) { |
| RollingLog log(env_, log_dir_, "rolling_log-test", "mylog"); |
| log.SetCompressionEnabled(false); |
| log.SetRollThresholdBytes(100); |
| |
| // Before writing anything, we shouldn't open a log file. |
| vector<string> children; |
| NO_FATALS(AssertLogCount(0, &children)); |
| |
| // Appending some data should write a new segment. |
| const string kTestString = "Hello world\n"; |
| ASSERT_OK(log.Append(kTestString)); |
| NO_FATALS(AssertLogCount(1, &children)); |
| |
| for (int i = 0; i < 10; i++) { |
| ASSERT_OK(log.Append(kTestString)); |
| } |
| NO_FATALS(AssertLogCount(2, &children)); |
| |
| faststring data; |
| string path = JoinPathSegments(log_dir_, children[0]); |
| ASSERT_OK(ReadFileToString(env_, path, &data)); |
| ASSERT_TRUE(HasPrefixString(data.ToString(), kTestString)) |
| << "Data missing"; |
| ASSERT_LE(data.size(), 100 + kTestString.length()) |
| << "Roll threshold not respected"; |
| } |
| |
| // Test with compression on. |
| TEST_F(RollingLogTest, TestCompression) { |
| RollingLog log(env_, log_dir_, "rolling_log-test", "mylog"); |
| ASSERT_OK(log.Open()); |
| |
| StringPiece data = "Hello world\n"; |
| int raw_size = 0; |
| for (int i = 0; i < 1000; i++) { |
| ASSERT_OK(log.Append(data)); |
| raw_size += data.size(); |
| } |
| ASSERT_OK(log.Close()); |
| |
| vector<string> children; |
| NO_FATALS(AssertLogCount(1, &children)); |
| ASSERT_TRUE(HasSuffixString(children[0], ".gz")); |
| |
| // Ensure that the output is actually gzipped. |
| uint64_t size; |
| ASSERT_OK(env_->GetFileSize(JoinPathSegments(log_dir_, children[0]), &size)); |
| ASSERT_LT(size, raw_size / 10); |
| ASSERT_GT(size, 0); |
| } |
| |
| TEST_F(RollingLogTest, TestFileCountLimit) { |
| RollingLog log(env_, log_dir_, "rolling_log-test", "mylog"); |
| ASSERT_OK(log.Open()); |
| log.SetRollThresholdBytes(100); |
| log.SetMaxNumSegments(3); |
| |
| for (int i = 0; i < 100; i++) { |
| ASSERT_OK(log.Append("hello world\n")); |
| } |
| ASSERT_OK(log.Close()); |
| |
| vector<string> children; |
| NO_FATALS(AssertLogCount(3, &children)); |
| } |
| |
| } // namespace kudu |