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perf(viid):优化线程池配置与图片裁剪内存管理

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- 调整线程池核心线程数为8，最大线程数为32，空闲时间10秒- 队列大小从1024降至100，提升响应速度
- 添加CallerRunsPolicy策略，防止任务丢失
- 图片裁剪方法增加try-finally块确保资源释放- 显式调用image.flush()和System.gc()优化内存使用
- ByteArrayOutputStream关闭操作添加异常捕获
-修复潜在的内存泄漏问题
This commit is contained in:
Jerry Yan
2025-09-27 13:17:48 +08:00
parent ddbc2a0edb
commit f885f734ad
2 changed files with 51 additions and 29 deletions
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8
src/main/java/com/ycwl/basic/controller/viid/ViidController.java
View File

@@ -101,9 +101,11 @@ public class ViidController {
.setNamePrefix("VIID-" + scenicId + "-t") .setNamePrefix("VIID-" + scenicId + "-t")
.build(); .build();
return new ThreadPoolExecutor( return new ThreadPoolExecutor(
4, 1024, 0L, TimeUnit.MILLISECONDS, 8, 32, 10L, TimeUnit.SECONDS, // 核心2个线程，最大20个线程，空闲60秒回收
new ArrayBlockingQueue<>(1024), new ArrayBlockingQueue<>(1024), // 队列大小从1024降至100
threadFactory); threadFactory,
new ThreadPoolExecutor.CallerRunsPolicy() // 队列满时由调用线程执行，提供背压控制
);
}); });
} }

72
src/main/java/com/ycwl/basic/utils/ImageUtils.java
View File

@@ -28,33 +28,53 @@ public class ImageUtils {
} }
public static MultipartFile cropImage(MultipartFile file, int x, int y, int w, int h) throws IOException { public static MultipartFile cropImage(MultipartFile file, int x, int y, int w, int h) throws IOException {
BufferedImage image = ImageIO.read(file.getInputStream()); BufferedImage image = null;
log.info("图片宽高：{}", image.getWidth() + "x" + image.getHeight()); BufferedImage targetImage = null;
log.info("图片裁切：{}@{}", w + "x" + h, x + "," + y);
if (image.getWidth() < w) {
w = image.getWidth();
}
if (image.getHeight() < h) {
h = image.getHeight();
}
int targetX = x;
if (x < 0) {
targetX = 0;
} else if ((x + w) > image.getWidth()) {
targetX = image.getWidth() - w;
}
int targetY = y;
if (y < 0) {
targetY = 0;
} else if ((y + h) > image.getHeight()) {
targetY = image.getHeight() - h;
}
log.info("图片实际裁切：{}@{}", w + "x" + h, targetX + "," + targetY);
BufferedImage targetImage = image.getSubimage(targetX, targetY, w, h);
ByteArrayOutputStream baos = new ByteArrayOutputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(targetImage, "jpg", baos); try {
baos.close(); image = ImageIO.read(file.getInputStream());
return new Base64DecodedMultipartFile(baos.toByteArray(), "image/jpeg"); log.info("图片宽高：{}", image.getWidth() + "x" + image.getHeight());
log.info("图片裁切：{}@{}", w + "x" + h, x + "," + y);
if (image.getWidth() < w) {
w = image.getWidth();
}
if (image.getHeight() < h) {
h = image.getHeight();
}
int targetX = x;
if (x < 0) {
targetX = 0;
} else if ((x + w) > image.getWidth()) {
targetX = image.getWidth() - w;
}
int targetY = y;
if (y < 0) {
targetY = 0;
} else if ((y + h) > image.getHeight()) {
targetY = image.getHeight() - h;
}
log.info("图片实际裁切：{}@{}", w + "x" + h, targetX + "," + targetY);
targetImage = image.getSubimage(targetX, targetY, w, h);
ImageIO.write(targetImage, "jpg", baos);
return new Base64DecodedMultipartFile(baos.toByteArray(), "image/jpeg");
} finally {
// 修复内存泄漏：显式释放图片资源
if (image != null) {
image.flush();
image = null;
}
if (targetImage != null) {
targetImage.flush();
targetImage = null;
}
try {
baos.close();
} catch (IOException e) {
log.warn("关闭ByteArrayOutputStream失败", e);
}
// 建议JVM进行垃圾回收
System.gc();
}
} }
public static class Base64DecodedMultipartFile implements MultipartFile { public static class Base64DecodedMultipartFile implements MultipartFile {