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Make jar caching configurable through setUseCaches

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Closes gh-34678
This commit is contained in:
Juergen Hoeller
2025-03-31 16:41:16 +02:00
parent 743f32675d
commit 7b08feeb6d
2 changed files with 38 additions and 8 deletions
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43
spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java
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@@ -215,6 +215,8 @@ import org.springframework.util.StringUtils;
*/
public class PathMatchingResourcePatternResolver implements ResourcePatternResolver {
private static final Resource[] EMPTY_RESOURCE_ARRAY = {};
private static final Log logger = LogFactory.getLog(PathMatchingResourcePatternResolver.class);
/**
@@ -257,6 +259,8 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
private PathMatcher pathMatcher = new AntPathMatcher();
private boolean useCaches = true;
private final Map<String, Resource[]> rootDirCache = new ConcurrentHashMap<>();
private final Map<String, NavigableSet<String>> jarEntriesCache = new ConcurrentHashMap<>();
@@ -331,6 +335,22 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
return this.pathMatcher;
}
/**
* Specify whether this resolver should use jar caches. Default is {@code true}.
* <p>Switch this flag to {@code false} in order to avoid any jar caching, at
* the {@link JarURLConnection} level as well as within this resolver instance.
* <p>Note that {@link JarURLConnection#setDefaultUseCaches} can be turned off
* independently. This resolver-level setting is designed to only enforce
* {@code JarURLConnection#setUseCaches(false)} if necessary but otherwise
* leaves the JVM-level default in place.
* @since 6.1.19
* @see JarURLConnection#setUseCaches
* @see #clearCache()
*/
public void setUseCaches(boolean useCaches) {
this.useCaches = useCaches;
}
@Override
public Resource getResource(String location) {
@@ -354,7 +374,7 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
// all class path resources with the given name
Collections.addAll(resources, findAllClassPathResources(locationPatternWithoutPrefix));
}
return resources.toArray(new Resource[0]);
return resources.toArray(EMPTY_RESOURCE_ARRAY);
}
else {
// Generally only look for a pattern after a prefix here,
@@ -398,7 +418,7 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
if (logger.isTraceEnabled()) {
logger.trace("Resolved class path location [" + path + "] to resources " + result);
}
return result.toArray(new Resource[0]);
return result.toArray(EMPTY_RESOURCE_ARRAY);
}
/**
@@ -535,7 +555,9 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
Set<ClassPathManifestEntry> entries = this.manifestEntriesCache;
if (entries == null) {
entries = getClassPathManifestEntries();
this.manifestEntriesCache = entries;
if (this.useCaches) {
this.manifestEntriesCache = entries;
}
}
for (ClassPathManifestEntry entry : entries) {
if (!result.contains(entry.resource()) &&
@@ -687,7 +709,9 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
if (rootDirResources == null) {
// Lookup for specific directory, creating a cache entry for it.
rootDirResources = getResources(rootDirPath);
this.rootDirCache.put(rootDirPath, rootDirResources);
if (this.useCaches) {
this.rootDirCache.put(rootDirPath, rootDirResources);
}
}
}
@@ -719,7 +743,7 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
if (logger.isTraceEnabled()) {
logger.trace("Resolved location pattern [" + locationPattern + "] to resources " + result);
}
return result.toArray(new Resource[0]);
return result.toArray(EMPTY_RESOURCE_ARRAY);
}
/**
@@ -840,6 +864,9 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
if (con instanceof JarURLConnection jarCon) {
// Should usually be the case for traditional JAR files.
if (!this.useCaches) {
jarCon.setUseCaches(false);
}
try {
jarFile = jarCon.getJarFile();
jarFileUrl = jarCon.getJarFileURL().toExternalForm();
@@ -903,8 +930,10 @@ public class PathMatchingResourcePatternResolver implements ResourcePatternResol
}
}
}
// Cache jar entries in TreeSet for efficient searching on re-encounter.
this.jarEntriesCache.put(jarFileUrl, entriesCache);
if (this.useCaches) {
// Cache jar entries in TreeSet for efficient searching on re-encounter.
this.jarEntriesCache.put(jarFileUrl, entriesCache);
}
return result;
}
finally {