com.tangosol.io.pof.SafeConfigurablePofContext Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.io.pof;
import com.tangosol.run.xml.XmlElement;
import com.tangosol.io.DefaultSerializer;
import com.tangosol.io.Evolvable;
import com.tangosol.io.ReadBuffer;
import com.tangosol.io.Serializer;
import com.tangosol.util.Binary;
import com.tangosol.util.BinaryWriteBuffer;
import com.tangosol.util.ExternalizableHelper;
import com.tangosol.util.SafeHashSet;
import java.io.IOException;
import java.io.Serializable;
import java.util.Map;
import java.util.Set;
/**
* SafeConfigurablePofContext is an extension of ConfigurablePofContext that can
* serialize and deserialize any valid POF user type, even those that have not
* been explicitly configured, as well as any Java serializable types
* (Serializable, Externalizable, or ExternalizableLite).
*
* Important note: this PofContext has the following limitations:
*
* - SafeConfigurablePofContext is supported only for Java clients;
*
- its performance is less optimal than of the ConfigurablePofContext;
*
- the serialized form produced by the SafeConfigurablePofContext will
* not be recognized by POF aware ValueExtractors.
*
*
*
* For user types that have been explicitly configured, the
* SafeConfigurablePofContext behaves identical to the ConfigurablePofContext.
*
* @author jh 2007.05.03
* @since Coherence 3.3
*/
public class SafeConfigurablePofContext
extends ConfigurablePofContext
{
// ----- constructors ---------------------------------------------------
/**
* Default constructor.
*
* Create a default SafeConfigurablePofContext that will load
* configuration information from the locator specified in
* {@link #DEFAULT_RESOURCE}.
*/
public SafeConfigurablePofContext()
{
super();
f_serializerJava = new JavaPofSerializer();
}
/**
* Create a SafeConfigurablePofContext that will load configuration
* information from the specified locator.
*
* @param sLocator the locator that specifies the location of the
* PofContext configuration file; the locator is either
* a valid path or a URL
*/
public SafeConfigurablePofContext(String sLocator)
{
super(sLocator);
f_serializerJava = new JavaPofSerializer();
}
/**
* Create a SafeConfigurablePofContext that serializes instances of
* non-POF classes with specified serializer.
*
* @param serializer cache config specified serializer to use for non-POF types
* @param loader context classloader to use with serializer
*/
public SafeConfigurablePofContext(Serializer serializer, ClassLoader loader)
{
super();
f_serializerJava = new ExternalSerializer(serializer, /* fWarn */ false);
setContextClassLoader(loader);
}
/**
* Create a SafeConfigurablePofContext that will use the passed
* configuration information.
*
* @param xml an XmlElement containing information in the format of a
* configuration file used by SafeConfigurablePofContext
*/
public SafeConfigurablePofContext(XmlElement xml)
{
super(xml);
f_serializerJava = new JavaPofSerializer();
}
// ----- PofContext interface -------------------------------------------
/**
* {@inheritDoc}
*/
public PofSerializer getPofSerializer(int nTypeId)
{
switch (nTypeId)
{
case TYPE_PORTABLE:
return f_serializerPof;
case TYPE_SERIALIZABLE:
return f_serializerJava;
default:
return super.getPofSerializer(nTypeId);
}
}
/**
* {@inheritDoc}
*/
public Class getClass(int nTypeId)
{
switch (nTypeId)
{
case TYPE_PORTABLE:
// should never get here
return PortableObject.class;
case TYPE_SERIALIZABLE:
// should never get here
return Serializable.class;
default:
return super.getClass(nTypeId);
}
}
/**
* {@inheritDoc}
*/
public int getUserTypeIdentifier(Class clz)
{
int nTypeId = getUserTypeIdentifierInternal(clz);
if (nTypeId < 0)
{
if (isUserType(clz))
{
nTypeId = getGenericTypeId(clz);
Map mapClzToId = getPofConfig().m_mapTypeIdByClass;
mapClzToId.put(clz, Integer.valueOf(nTypeId));
}
else
{
throw new IllegalArgumentException("Unknown user type: " + clz);
}
}
return nTypeId;
}
/**
* {@inheritDoc}
*/
public int getUserTypeIdentifier(String sClass)
{
int nTypeId = getUserTypeIdentifierInternal(sClass);
if (nTypeId < 0)
{
if (isUserType(sClass))
{
nTypeId = getGenericTypeId(loadClass(sClass));
Map mapNameToId = getPofConfig().m_mapTypeIdByClassName;
mapNameToId.put(sClass, Integer.valueOf(nTypeId));
}
else
{
throw new IllegalArgumentException("Unknown user type: " + sClass);
}
}
return nTypeId;
}
/**
* {@inheritDoc}
*/
public boolean isUserType(Class clz)
{
boolean fUserType = super.isUserType(clz);
if (!fUserType)
{
if (!PofHelper.isIntrinsicPofType(clz))
{
fUserType = PortableObject.class.isAssignableFrom(clz) ||
Serializable.class.isAssignableFrom(clz);
}
}
return fUserType;
}
/**
* {@inheritDoc}
*/
public boolean isUserType(String sClass)
{
boolean fUserType = super.isUserType(sClass);
if (!fUserType)
{
try
{
Class clz = loadClass(sClass);
if (!PofHelper.isIntrinsicPofType(clz))
{
fUserType = PortableObject.class.isAssignableFrom(clz) ||
Serializable.class.isAssignableFrom(clz);
}
}
catch (RuntimeException e)
{
}
}
return fUserType;
}
/**
* For user types that are not registered in the POF configuration used
* by this PofContext, determine if the user type can be serialized using
* POF, otherwise determine if the user type can be serialized using the
* traditional (pre-POF) Coherence Java Serialization format that supports
* Java Serializable and ExternalizableLite objects.
*
* @param clz a user type class that is not configured in this PofContext
*
* @return a special user type id that indicates that the user type is
* supported by "generic" POF serialization or traditional
* Java serialization embedded in a POF stream
*/
protected int getGenericTypeId(Class clz)
{
if (PortableObject.class.isAssignableFrom(clz))
{
return TYPE_PORTABLE;
}
if (Serializable.class.isAssignableFrom(clz))
{
return TYPE_SERIALIZABLE;
}
throw new IllegalArgumentException("The \"" + clz.getName()
+ "\" class is unsupported by " + getClass().getName());
}
// ----- inner class: ExternalSerializer ---------------------------------
/**
* Serializer used for Serializable and ExternalizableLite objects.
*/
public class ExternalSerializer
extends ExternalizableHelper
implements PofSerializer
{
// ----- constructors -----------------------------------------------
/**
* Construct {@link ExternalSerializer} with specified non-POF serializer.
*
* @param serializer cache configured serializer
* @param fWarn emit a warning if POF not configured for type
*/
public ExternalSerializer(Serializer serializer, boolean fWarn)
{
f_serializer = serializer;
f_warn = fWarn;
}
// ----- PofSerializer methods --------------------------------------
/**
* {@inheritDoc}
*/
public void serialize(PofWriter out, Object o)
throws IOException
{
out.writeBinary(0, toBinary(o, f_serializer));
out.writeRemainder(null);
register(o);
}
/**
* {@inheritDoc}
*/
public Object deserialize(PofReader in)
throws IOException
{
Object o = fromBinary(in.readBinary(0), f_serializer);
in.registerIdentity(o);
in.readRemainder();
register(o);
return o;
}
// ----- internal -----------------------------------------------
/**
* Register a class as having been encountered by the serializer.
*
* @param o an object that is being serialized or has been
* deserialized
*/
protected void register(Object o)
{
if (o != null)
{
String sClass = o.getClass().getName();
if (m_setRegisteredClasses.add(sClass) && f_warn)
{
log("TODO: Add POF support for \"" + sClass + "\".");
}
}
}
// ----- data members -------------------------------------------
/**
* Serializer used by this PofSerializer.
*/
private final Serializer f_serializer;
/**
* Warn if missing POF type.
*/
private final boolean f_warn;
/**
* All classes that have been registered.
*/
private final Set m_setRegisteredClasses = new SafeHashSet();
}
// ----- inner class: JavaPofSerializer ---------------------------------
/**
* Default Java serializer.
*/
public class JavaPofSerializer extends ExternalSerializer
{
public JavaPofSerializer()
{
super(new DefaultSerializer(getContextClassLoader()), /*fWarn*/true);
}
}
// ----- inner class: SafePofSerializer ---------------------------------
/**
* Serializer used for objects implementing the PortableObject interface.
*/
public class SafePofSerializer
extends ExternalizableHelper
implements PofSerializer
{
// ----- PofSerializer methods ----------------------------------
/**
* {@inheritDoc}
*/
public void serialize(PofWriter out, Object o)
throws IOException
{
BinaryWriteBuffer buffer = new BinaryWriteBuffer(1024*8);
PofBufferWriter writer = new PofBufferWriter.UserTypeWriter(
buffer.getBufferOutput(), SafeConfigurablePofContext.this,
TYPE_PORTABLE, -1);
// COH-5065: due to the complexity of maintaining references
// in future data, we won't support them for Evolvable objects
if (SafeConfigurablePofContext.this.isReferenceEnabled()
&& !(o instanceof Evolvable))
{
writer.enableReference();
}
m_serializer.serialize(writer, o);
String sClass = o.getClass().getName();
out.writeString(0, sClass);
out.writeBinary(1, buffer.toBinary());
out.writeRemainder(null);
register(sClass);
}
/**
* {@inheritDoc}
*/
public Object deserialize(PofReader in)
throws IOException
{
String sClass = in.readString(0);
Binary bin = in.readBinary(1);
in.readRemainder();
ConfigurablePofContext ctx = SafeConfigurablePofContext.this;
PortableObject po;
try
{
po = (PortableObject) ctx.loadClass(sClass).newInstance();
}
catch (Throwable e)
{
throw ensureRuntimeException(e,
"Unable to instantiate PortableObject class: " + sClass);
}
ReadBuffer.BufferInput inInternal = bin.getBufferInput();
int nType = inInternal.readPackedInt();
if (nType != TYPE_PORTABLE)
{
throw new IOException("Invalid POF type: " + nType
+ " (" + TYPE_PORTABLE + " expected)");
}
int iVersion = inInternal.readPackedInt();
PofReader reader = new PofBufferReader.UserTypeReader(
inInternal, ctx, TYPE_PORTABLE, iVersion);
m_serializer.initialize(po, reader);
register(sClass);
return po;
}
// ----- internal -----------------------------------------------
/**
* Register a class as having been encountered by the serializer.
*
* @param sClass the name of a class that is being serialized or
* deserialized
*/
protected void register(String sClass)
{
if (m_setRegisteredClasses.add(sClass))
{
log("TODO: Add the class \"" + sClass
+ "\" to the POF configuration file.");
}
}
// ----- data members -------------------------------------------
/**
* Serializer used by this PofSerializer.
*/
private final PortableObjectSerializer m_serializer =
new PortableObjectSerializer(TYPE_PORTABLE);
/**
* All classes that have been registered.
*/
private final Set m_setRegisteredClasses = new SafeHashSet();
}
// ----- constants ------------------------------------------------------
/**
* The type identifier for objects that implement the PortableObject
* interface.
*/
public static final int TYPE_PORTABLE = Integer.MAX_VALUE - 1;
/**
* The type identifier for Java Serializable (including the
* ExternalizableLite format) objects.
*/
public static final int TYPE_SERIALIZABLE = Integer.MAX_VALUE;
// ----- data members ---------------------------------------------------
/**
* Serializer used for Serializable objects.
*/
private final PofSerializer f_serializerJava;
/**
* Serializer used for [not registered] objects implementing PortableObject
* interface.
*/
private final PofSerializer f_serializerPof = new SafePofSerializer();
}