Is there a listener fired when coherence client reads cache?

Hello,
we have to check (in coherence grid) if we can return certain object from cache for given user.
For example he creates filter that will return all cities for given country. But according to user rights - we can't show him cities with population higher than 1 milion. That objects should not be even transferred from coherence to client application.
How can we achieve such a filtering/security in coherence? (we have milions of objects in caches and we need to do it on coherence side due to performance)
Best Regards
Jarek

Hi,
For your information, we have integrated FCKEditor (CKEditor's ancestor) into an ADF 11g application.
I know it is very different from CKEditor, but we have been forced to create our own JSF component and made several hooks to the framework to make it behave like desired.
One of the problem we have faced is the lost of the input values when partial submit was performed on the editor isntance.
Just so you know it might be real hard to integrate the component without creating a JSF component.
Regards,
JP

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I'm not sure it is that messy.
1. The custom client side serializer
package com.gridman.test;
import com.tangosol.io.ReadBuffer;
import com.tangosol.io.WriteBuffer;
import com.tangosol.io.pof.ConfigurablePofContext;
import com.tangosol.io.pof.PofBufferReader;
import com.tangosol.io.pof.PofBufferWriter;
import com.tangosol.io.pof.PofContext;
import java.io.IOException;
public class PassThroughPofContext extends ConfigurablePofContext {
    public PassThroughPofContext(String sLocator) {
        super(sLocator);
    @Override
    public void serialize(WriteBuffer.BufferOutput out, Object o) throws IOException {
        try {
            if (o instanceof PassThrough) {
                PassThrough passThrough = (PassThrough)o;
                out.writePackedInt(passThrough.getType());
                out.writeBuffer(passThrough.getValue());
            } else {
                PofBufferWriter writer = new PofBufferWriter(out, this);
                writer.writeObject(-1, o);
        } catch (RuntimeException e) {
            throw new IOException(e.getMessage(), e);
    @Override
    public Object deserialize(ReadBuffer.BufferInput in) throws IOException {
        try {
            Reader reader = new Reader(in, this);
            return reader.readObject(-1);
        } catch (RuntimeException e) {
            throw new IOException(e.getMessage(), e);
    @Override
    public int getUserTypeIdentifier(Object o) {
        int id;
        if (o instanceof PassThrough) {
            id = ((PassThrough)o).getType();
        } else {
            id = super.getUserTypeIdentifier(o);
        return id;
    private boolean isUserType(int type) {
        ensureInitialized();
        Class[] types = this.getPofConfig().m_aClzByTypeId;
        return types.length > type && types[type] != null;
    private class Reader extends PofBufferReader {
        private Reader(ReadBuffer.BufferInput in, PofContext ctx) {
            super(in, ctx);
        @Override
        protected Object readAsObject(int nType) throws IOException {
            Object value;
            if (((PassThroughPofContext)this.m_ctx).isUserType(nType)) {
                value = super.readAsObject(nType);
            } else {
                value = new PassThrough(nType, this.m_in);
            return value;
}2. The class that will be used to hold anything that the serializer does not know how to handle
package com.gridman.test;
import com.tangosol.io.ReadBuffer;
import java.io.IOException;
public class PassThrough {
    private int type;
    private ReadBuffer value;
    public PassThrough(int type, ReadBuffer.BufferInput in) throws IOException {
        this.type = type;
        this.value = in.readBuffer(in.available());
    public int getType() {
        return type;
    public ReadBuffer getValue() {
        return value;
}3. The client cache config
<cache-config>
    <caching-scheme-mapping>
        <cache-mapping>
            <cache-name>*</cache-name>
            <scheme-name>proxy</scheme-name>
        </cache-mapping>
    </caching-scheme-mapping>
    <caching-schemes>
        <remote-cache-scheme>
            <scheme-name>proxy</scheme-name>
            <service-name>extend-service</service-name>
            <initiator-config>
                <tcp-initiator>
                    <remote-addresses>
                        <socket-address>
                            <address>... put host name here ...</address>
                            <port>10000</port>
                        </socket-address>
                    </remote-addresses>
                </tcp-initiator>
                <serializer>
                    <instance>
                        <class-name>com.gridman.test.PassThroughPofContext</class-name>
                        <init-params>
                            <init-param>
                                <param-type>String</param-type>
                                <param-value system-property="tangosol.pof.config">coherence-pof-config.xml</param-value>
                            </init-param>
                        </init-params>
                    </instance>
                </serializer>
            </initiator-config>
        </remote-cache-scheme>
    </caching-schemes>
</cache-config>The above code and config is all you need. Everything below here is to test it.
To test it we just convert a class to Binary and back again using the server and client serializers E.G.
A simple POF class to test with - this would only be on the server side
package com.gridman.test;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
import java.io.IOException;
public class TestPortableObject implements PortableObject {
    private String field1;
    private int field2;
    public TestPortableObject() {
    public TestPortableObject(String field1, int field2) {
        this.field1 = field1;
        this.field2 = field2;
    @Override
    public void readExternal(PofReader pofReader) throws IOException {
        field1 = pofReader.readString(1);
        field2 = pofReader.readInt(2);
    @Override
    public void writeExternal(PofWriter pofWriter) throws IOException {
        pofWriter.writeString(1, field1);
        pofWriter.writeInt(2, field2);
    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        if (o == null || getClass() != o.getClass()) {
            return false;
        TestPortableObject that = (TestPortableObject) o;
        if (field2 != that.field2) {
            return false;
        if (field1 != null ? !field1.equals(that.field1) : that.field1 != null) {
            return false;
        return true;
    @Override
    public int hashCode() {
        int result = field1 != null ? field1.hashCode() : 0;
        result = 31 * result + field2;
        return result;
}The test server side server-pof-config.xml file
<pof-config>
    <user-type-list>
        <include>coherence-common-pof-config.xml</include>
        <user-type>
            <type-id>1000</type-id>
            <class-name>com.gridman.test.TestPortableObject</class-name>
        </user-type>
    </user-type-list>
</pof-config>Now our test code...
package com.gridman.test;
import com.tangosol.io.pof.ConfigurablePofContext;
import com.tangosol.util.Binary;
import com.tangosol.util.ExternalizableHelper;
public class Main {
    public static void main(String[] args) {
        // Create an instance of our test PortableObject
        TestPortableObject testPortableObject = new TestPortableObject("testing...", 1234);
        // This is the server side serializer that uses the server side POF config
        ConfigurablePofContext pofContext = new ConfigurablePofContext("server-pof-config.xml");
        // This is the custom client side serializer that just uses the Coherence pof config
        PassThroughPofContext passThroughPofContext = new PassThroughPofContext("coherence-common-pof-config.xml");
        // Serialize our test instance using the server side serializer
        // This would be equivalent to a Binary that would have been sent from the server to the client
        Binary binaryFromServer = ExternalizableHelper.toBinary(testPortableObject, pofContext);
        // Deserialize the binaryFromServer using the client side serializer
        // Just as if the client had recieved this over the wire from the server
        PassThrough passThrough = (PassThrough) ExternalizableHelper.fromBinary(binaryFromServer, passThroughPofContext);
        // Serialise the PassThrough to Binary using the client side serializer
        // as though we are sending the value back over the wire to the server
        Binary serializedPassThrough = ExternalizableHelper.toBinary(passThrough, passThroughPofContext);
        // Deserialize back to an Object using the server side serializer
        TestPortableObject result = (TestPortableObject) ExternalizableHelper.fromBinary(serializedPassThrough, pofContext);
        // The result should be equal to the original testPortableObject
        System.out.println("Result: " + testPortableObject.equals(result));
}running the above code should print out: Result: true
This was put together pretty quickly so I'm sure people will comment if I have missed anything.
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