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Only call URL.setURLStreamHandlerFactory once

Calling URL.setURLStreamHandlerFactory a second time causes Java to throw an error.
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commit c6f8eef78bbb9d2eee9e02916e39788598d627f1 1 parent 8794050
@candrews authored
9 src/main/java/com/integralblue/httpresponsecache/
@@ -146,6 +146,8 @@
public final class HttpResponseCache extends ResponseCache
implements Closeable, ExtendedResponseCache {
+ private static boolean calledSetURLStreamHandlerFactory = false;
private final delegate;
private HttpResponseCache(File directory, long maxSize) throws IOException {
@@ -188,8 +190,13 @@ public static HttpResponseCache install(File directory, long maxSize) throws IOE
HttpResponseCache result = new HttpResponseCache(directory, maxSize);
- URL.setURLStreamHandlerFactory(new URLStreamHandlerFactoryImpl());
HttpsURLConnection.setDefaultHostnameVerifier(new DefaultHostnameVerifier());
+ if(!calledSetURLStreamHandlerFactory) {
+ // The stream handler factory can only be set once, so don't set it again if it's already been set
+ // This can happen if the application calls install() then delete() then install() again
+ calledSetURLStreamHandlerFactory = true;
+ URL.setURLStreamHandlerFactory(new URLStreamHandlerFactoryImpl());
+ }
return result;
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