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HTTPCORE-761: support ExtendedSocketOption (#473)
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77 changes: 77 additions & 0 deletions
77
httpcore5/src/main/java/org/apache/hc/core5/io/SocketSupport.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * ==================================================================== | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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 | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * 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. | ||
| * ==================================================================== | ||
| * | ||
| * This software consists of voluntary contributions made by many | ||
| * individuals on behalf of the Apache Software Foundation. For more | ||
| * information on the Apache Software Foundation, please see | ||
| * <http://www.apache.org/>. | ||
| * | ||
| */ | ||
|
|
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| package org.apache.hc.core5.io; | ||
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|
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| import java.io.IOException; | ||
| import java.lang.reflect.Field; | ||
| import java.lang.reflect.Method; | ||
| import java.net.SocketOption; | ||
|
|
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| import org.apache.hc.core5.annotation.Internal; | ||
|
|
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| /** | ||
| * @since 5.3 | ||
| */ | ||
| @Internal | ||
| public class SocketSupport { | ||
|
|
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| public static final String TCP_KEEPIDLE = "TCP_KEEPIDLE"; | ||
| public static final String TCP_KEEPINTERVAL = "TCP_KEEPINTERVAL"; | ||
| public static final String TCP_KEEPCOUNT = "TCP_KEEPCOUNT"; | ||
|
|
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| @SuppressWarnings("unchecked") | ||
| public static <T> SocketOption<T> getExtendedSocketOptionOrNull(final String fieldName) { | ||
| try { | ||
| final Class<?> extendedSocketOptionsClass = Class.forName("jdk.net.ExtendedSocketOptions"); | ||
| final Field field = extendedSocketOptionsClass.getField(fieldName); | ||
| return (SocketOption<T>) field.get(null); | ||
| } catch (final Exception ignore) { | ||
| return null; | ||
| } | ||
| } | ||
|
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| /** | ||
| * object can be ServerSocket or Socket | ||
| */ | ||
| public static <T> void setOption(final T object, final String fieldName, final T value) throws IOException { | ||
| try { | ||
| final Class<?> serverSocketClass = object.getClass(); | ||
| final Method setOptionMethod = serverSocketClass.getMethod("setOption", SocketOption.class, Object.class); | ||
| final SocketOption<Integer> socketOption = getExtendedSocketOptionOrNull(fieldName); | ||
| if (socketOption == null) { | ||
| throw new UnsupportedOperationException("Extended socket option not supported: " + fieldName); | ||
| } | ||
| setOptionMethod.invoke(object, socketOption, value); | ||
| } catch (final UnsupportedOperationException e) { | ||
| throw e; | ||
| } catch (final Exception ex) { | ||
| throw new IOException("Failure setting extended socket option", ex); | ||
| } | ||
| } | ||
|
|
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| } |
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