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Avoid opening InputStream via URL when calling super.getResourceAsStream

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When bootstrap resources are supported delegating to super.getResourceAsStream() will cause opening InputStreams from URL. This isn't as efficient as own UrlClassLoader's capability to use existing open ZipFile handles

GitOrigin-RevId: 48fa777911b29196899275119c6ccabbebca9afc
This commit is contained in:
Maxim.Mossienko
2019-05-29 11:08:29 +03:00
committed by intellij-monorepo-bot
parent 867986fa4d
commit 4c9fb78cb0
1 changed files with 10 additions and 2 deletions
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platform/util-class-loader/src/com/intellij/util/lang/UrlClassLoader.java
+10 -2
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@@ -63,7 +63,6 @@ public class UrlClassLoader extends ClassLoader {
@SuppressWarnings("unused")
void appendToClassPathForInstrumentation(String jar) {
try {
//noinspection deprecation
addURL(new File(jar).toURI().toURL());
} catch(MalformedURLException ignore) {}
}
@@ -345,8 +344,11 @@ public class UrlClassLoader extends ClassLoader {
return defineClass(name, b, 0, b.length, protectionDomain);
}
private static final ThreadLocal<Boolean> ourSkipFindingResource = new ThreadLocal<Boolean>();
@Override
public URL findResource(String name) {
if (ourSkipFindingResource.get() != null) return null;
Resource res = findResourceImpl(name);
return res != null ? res.getURL() : null;
}
@@ -365,7 +367,13 @@ public class UrlClassLoader extends ClassLoader {
@Override
public InputStream getResourceAsStream(String name) {
if (myAllowBootstrapResources) {
return super.getResourceAsStream(name);
ourSkipFindingResource.set(Boolean.TRUE);
try {
InputStream stream = super.getResourceAsStream(name);
if (stream != null) return stream;
} finally {
ourSkipFindingResource.set(null);
}
}
try {
Resource res = findResourceImpl(name);