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Spring Framework 2.0.5 API 文档英文版
CodebaseAwareObjectInputStream (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版
org.springframework.remoting.rmi
Class CodebaseAwareObjectInputStream
java.lang.Object
java.io.InputStream
java.io.ObjectInputStream
org.springframework.remoting.rmi.CodebaseAwareObjectInputStream
- All Implemented Interfaces:
- Closeable, DataInput, ObjectInput, ObjectStreamConstants
public class CodebaseAwareObjectInputStream
- extends ObjectInputStream
Special ObjectInputStream subclass that falls back to a specified codebase
to load classes from if not found locally. In contrast to standard RMI
conventions for dynamic class download, it is the client that determines
the codebase URL here, rather than the "java.rmi.server.codebase" system
property on the server.
Uses the JDK's RMIClassLoader to load classes from the specified codebase.
The codebase can consist of multiple URLs, separated by spaces.
Note that RMIClassLoader requires a SecurityManager to be set, like when
using dynamic class download with standard RMI! (See the RMI documentation
for details.)
Despite residing in the RMI package, this class is not used for
RmiClientInterceptor, which uses the standard RMI infrastructure instead
and thus is only able to rely on RMI's standard dynamic class download via
"java.rmi.server.codebase". CodebaseAwareObjectInputStream is used by
HttpInvokerClientInterceptor (see the "codebaseUrl" property there).
Thanks to Lionel Mestre for suggesting the option and providing
a prototype!
- Since:
- 1.1.3
- Author:
- Juergen Hoeller
- See Also:
RMIClassLoader
,
HttpInvokerClientInterceptor.setCodebaseUrl(java.lang.String)
Fields inherited from interface java.io.ObjectStreamConstants |
baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_ENUM, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_ENUM, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING |
Method Summary |
protected Class |
resolveClass(ObjectStreamClass classDesc)
Overridden version delegates to super class first,
falling back to the specified codebase if not found locally. |
protected Class |
resolveProxyClass(String[] interfaces)
Overridden version delegates to super class first,
falling back to the specified codebase if not found locally. |
Methods inherited from class java.io.ObjectInputStream |
available, close, defaultReadObject, enableResolveObject, read, read, readBoolean, readByte, readChar, readClassDescriptor, readDouble, readFields, readFloat, readFully, readFully, readInt, readLine, readLong, readObject, readObjectOverride, readShort, readStreamHeader, readUnshared, readUnsignedByte, readUnsignedShort, readUTF, registerValidation, resolveObject, skipBytes |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CodebaseAwareObjectInputStream
public CodebaseAwareObjectInputStream(InputStream in,
String codebaseUrl)
throws IOException
- Create a new CodebaseAwareObjectInputStream for the given InputStream and codebase.
- Parameters:
in
- the InputStream to read fromcodebaseUrl
- the codebase URL to load classes from if not found locally
(can consist of multiple URLs, separated by spaces)
- Throws:
IOException
- See Also:
ObjectInputStream.ObjectInputStream(java.io.InputStream)
CodebaseAwareObjectInputStream
public CodebaseAwareObjectInputStream(InputStream in,
ClassLoader classLoader,
String codebaseUrl)
throws IOException
- Create a new CodebaseAwareObjectInputStream for the given InputStream and codebase.
- Parameters:
in
- the InputStream to read fromclassLoader
- the ClassLoader to use for loading local classes
(may be null
to indicate RMI's default ClassLoader)codebaseUrl
- the codebase URL to load classes from if not found locally
(can consist of multiple URLs, separated by spaces)
- Throws:
IOException
- See Also:
ObjectInputStream.ObjectInputStream(java.io.InputStream)
resolveClass
protected Class resolveClass(ObjectStreamClass classDesc)
throws IOException,
ClassNotFoundException
- Overridden version delegates to super class first,
falling back to the specified codebase if not found locally.
- Overrides:
resolveClass
in class ObjectInputStream
- Throws:
IOException
ClassNotFoundException
resolveProxyClass
protected Class resolveProxyClass(String[] interfaces)
throws IOException,
ClassNotFoundException
- Overridden version delegates to super class first,
falling back to the specified codebase if not found locally.
- Overrides:
resolveProxyClass
in class ObjectInputStream
- Throws:
IOException
ClassNotFoundException
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