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docs/spring/cs858fd53a-3f01-11ee-a772-acde48001122.java
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package com.huifer.bigfile.services; | ||
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import org.slf4j.Logger; | ||
import org.slf4j.LoggerFactory; | ||
import org.springframework.beans.factory.annotation.Value; | ||
import org.springframework.stereotype.Service; | ||
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import javax.servlet.http.HttpServletRequest; | ||
import javax.servlet.http.HttpServletResponse; | ||
import java.io.FileInputStream; | ||
import java.io.IOException; | ||
import java.io.InputStream; | ||
import java.io.OutputStream; | ||
import java.util.concurrent.atomic.AtomicInteger; | ||
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/** | ||
* 限流下载service | ||
*/ | ||
@Service | ||
public class LimiterFileService { | ||
/** | ||
* 下载计数器:记录有多少个下载请求 | ||
*/ | ||
public static final AtomicInteger DOWNLOAD_NUM = new AtomicInteger(); | ||
protected static final Logger log = LoggerFactory.getLogger(LimiterFileService.class); | ||
/** | ||
* 最大下载速度,单位:kb | ||
*/ | ||
@Value("${max.download.speed}") | ||
public int maxDownloadSpeed; | ||
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public void downloadBreak(String name, HttpServletRequest request, HttpServletResponse response) { | ||
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} | ||
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/** | ||
* 限流下载 | ||
* // TODO: 2019/9/2 下载暂停会出现异常 | ||
* | ||
* @param exportUrl 下载文件url | ||
* @param speed 速度 | ||
* @param response response | ||
*/ | ||
public void downloadLimit(String exportUrl, int speed, HttpServletResponse response) { | ||
OutputStream out = null; | ||
String fileName = exportUrl.substring(exportUrl.lastIndexOf('/') + 1); | ||
response.setContentType("application/octet-stream"); | ||
response.setHeader("Content-Disposition", "attachment; filename=" + fileName); | ||
int downloadSpeed = speed; | ||
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try ( | ||
InputStream fileInputStream = new FileInputStream(exportUrl); | ||
) { | ||
BandwidthLimiter bandwidthLimiter = new BandwidthLimiter(downloadSpeed); | ||
DownloadLimiter downloadLimiter = new DownloadLimiter(fileInputStream, bandwidthLimiter); | ||
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out = response.getOutputStream(); | ||
int len = 0; | ||
while ((len = downloadLimiter.read()) != -1) { | ||
out.write(len); | ||
bandwidthLimiter.setMaxRate(speed); | ||
} | ||
out.flush(); | ||
out.close(); | ||
downloadLimiter.close(); | ||
} catch (IOException e) { | ||
log.error("下载失败={}", e); | ||
} finally { | ||
closeStream(out, null); | ||
} | ||
} | ||
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/** | ||
* 限流下载 | ||
* | ||
* @param exportUrl 下载文件url | ||
* @param response response | ||
*/ | ||
public void downloadLimit(String exportUrl, HttpServletResponse response) { | ||
DOWNLOAD_NUM.incrementAndGet(); | ||
OutputStream out = null; | ||
DownloadLimiter downloadLimiter = null; | ||
String fileName = exportUrl.substring(exportUrl.lastIndexOf('/') + 1); | ||
response.setContentType("application/octet-stream"); | ||
response.setHeader("Content-Disposition", "attachment; filename=" + fileName); | ||
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try (InputStream fileInputStream = new FileInputStream(exportUrl);) { | ||
int downloadSpeed = maxDownloadSpeed / DOWNLOAD_NUM.get(); | ||
BandwidthLimiter bandwidthLimiter = new BandwidthLimiter(downloadSpeed); | ||
downloadLimiter = new DownloadLimiter(fileInputStream, bandwidthLimiter); | ||
out = response.getOutputStream(); | ||
int len = 0; | ||
while ((len = downloadLimiter.read()) != -1) { | ||
out.write(len); | ||
bandwidthLimiter.setMaxRate(maxDownloadSpeed / DOWNLOAD_NUM.get()); | ||
} | ||
out.flush(); | ||
out.close(); | ||
downloadLimiter.close(); | ||
} catch (IOException e) { | ||
log.error("下载失败={}", e); | ||
} finally { | ||
closeStream(out, downloadLimiter); | ||
} | ||
DOWNLOAD_NUM.decrementAndGet(); | ||
} | ||
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/** | ||
* 关闭流 | ||
* | ||
* @param out OutputStream | ||
* @param downloadLimiter DownloadLimiter | ||
*/ | ||
protected void closeStream(OutputStream out, DownloadLimiter downloadLimiter) { | ||
if (out != null) { | ||
try { | ||
out.close(); | ||
} catch (IOException e) { | ||
log.error("输出流关闭失败{}", e); | ||
} | ||
} | ||
if (downloadLimiter != null) { | ||
try { | ||
downloadLimiter.close(); | ||
} catch (IOException e) { | ||
log.error("下载限流关闭失败={}", e); | ||
} | ||
} | ||
} | ||
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} |
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/** | ||
* Copyright 2009-2019 the original author or authors. | ||
* <p> | ||
* Licensed 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 | ||
* <p> | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* <p> | ||
* 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.ibatis.mapping; | ||
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import org.apache.ibatis.builder.InitializingObject; | ||
import org.apache.ibatis.cache.Cache; | ||
import org.apache.ibatis.cache.CacheException; | ||
import org.apache.ibatis.cache.impl.PerpetualCache; | ||
import org.assertj.core.api.Assertions; | ||
import org.junit.jupiter.api.Test; | ||
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import java.lang.reflect.Field; | ||
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import static com.googlecode.catchexception.apis.BDDCatchException.caughtException; | ||
import static com.googlecode.catchexception.apis.BDDCatchException.when; | ||
import static org.assertj.core.api.BDDAssertions.then; | ||
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class CacheBuilderTest { | ||
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@Test | ||
void testInitializing() { | ||
InitializingCache cache = unwrap(new CacheBuilder("test").implementation(InitializingCache.class).build()); | ||
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Assertions.assertThat(cache.initialized).isTrue(); | ||
} | ||
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@Test | ||
void testInitializingFailure() { | ||
when(() -> new CacheBuilder("test").implementation(InitializingFailureCache.class).build()); | ||
then(caughtException()).isInstanceOf(CacheException.class) | ||
.hasMessage("Failed cache initialization for 'test' on 'org.apache.ibatis.mapping.CacheBuilderTest$InitializingFailureCache'"); | ||
} | ||
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@SuppressWarnings("unchecked") | ||
private <T> T unwrap(Cache cache) { | ||
Field field; | ||
try { | ||
field = cache.getClass().getDeclaredField("delegate"); | ||
} catch (NoSuchFieldException e) { | ||
throw new IllegalStateException(e); | ||
} | ||
try { | ||
field.setAccessible(true); | ||
return (T) field.get(cache); | ||
} catch (IllegalAccessException e) { | ||
throw new IllegalStateException(e); | ||
} finally { | ||
field.setAccessible(false); | ||
} | ||
} | ||
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private static class InitializingCache extends PerpetualCache implements InitializingObject { | ||
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private boolean initialized; | ||
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public InitializingCache(String id) { | ||
super(id); | ||
} | ||
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@Override | ||
public void initialize() { | ||
this.initialized = true; | ||
} | ||
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} | ||
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private static class InitializingFailureCache extends PerpetualCache implements InitializingObject { | ||
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public InitializingFailureCache(String id) { | ||
super(id); | ||
} | ||
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@Override | ||
public void initialize() { | ||
throw new IllegalStateException("error"); | ||
} | ||
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} | ||
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} |
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/** | ||
* Copyright 2009-2019 the original author or authors. | ||
* <p> | ||
* Licensed 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 | ||
* <p> | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* <p> | ||
* 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.ibatis.type; | ||
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import org.junit.jupiter.api.Test; | ||
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import static org.junit.jupiter.api.Assertions.assertEquals; | ||
import static org.junit.jupiter.api.Assertions.assertNull; | ||
import static org.mockito.Mockito.verify; | ||
import static org.mockito.Mockito.when; | ||
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class EnumOrdinalTypeHandlerTest extends BaseTypeHandlerTest { | ||
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private static final TypeHandler<MyEnum> TYPE_HANDLER = new EnumOrdinalTypeHandler<MyEnum>(MyEnum.class); | ||
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@Override | ||
@Test | ||
public void shouldSetParameter() throws Exception { | ||
TYPE_HANDLER.setParameter(ps, 1, MyEnum.ONE, null); | ||
verify(ps).setInt(1, 0); | ||
} | ||
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@Test | ||
public void shouldSetNullParameter() throws Exception { | ||
TYPE_HANDLER.setParameter(ps, 1, null, JdbcType.VARCHAR); | ||
verify(ps).setNull(1, JdbcType.VARCHAR.TYPE_CODE); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultFromResultSetByName() throws Exception { | ||
when(rs.getInt("column")).thenReturn(0); | ||
when(rs.wasNull()).thenReturn(false); | ||
assertEquals(MyEnum.ONE, TYPE_HANDLER.getResult(rs, "column")); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultNullFromResultSetByName() throws Exception { | ||
when(rs.getInt("column")).thenReturn(0); | ||
when(rs.wasNull()).thenReturn(true); | ||
assertNull(TYPE_HANDLER.getResult(rs, "column")); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultFromResultSetByPosition() throws Exception { | ||
when(rs.getInt(1)).thenReturn(0); | ||
when(rs.wasNull()).thenReturn(false); | ||
assertEquals(MyEnum.ONE, TYPE_HANDLER.getResult(rs, 1)); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultNullFromResultSetByPosition() throws Exception { | ||
when(rs.getInt(1)).thenReturn(0); | ||
when(rs.wasNull()).thenReturn(true); | ||
assertNull(TYPE_HANDLER.getResult(rs, 1)); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultFromCallableStatement() throws Exception { | ||
when(cs.getInt(1)).thenReturn(0); | ||
when(cs.wasNull()).thenReturn(false); | ||
assertEquals(MyEnum.ONE, TYPE_HANDLER.getResult(cs, 1)); | ||
} | ||
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@Override | ||
@Test | ||
public void shouldGetResultNullFromCallableStatement() throws Exception { | ||
when(cs.getInt(1)).thenReturn(0); | ||
when(cs.wasNull()).thenReturn(true); | ||
assertNull(TYPE_HANDLER.getResult(cs, 1)); | ||
} | ||
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enum MyEnum { | ||
ONE, TWO | ||
} | ||
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} |
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