package org.jboss.as.clustering.infinispan.subsystem;
import static org.jboss.as.controller.ControllerLogger.MGMT_OP_LOGGER;
import static org.jboss.as.controller.ControllerMessages.MESSAGES;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.NAME;
import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.VALUE;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.ReloadRequiredWriteAttributeHandler;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.as.controller.operations.validation.ParameterValidator;
import org.jboss.as.controller.operations.validation.ParametersValidator;
import org.jboss.as.controller.operations.validation.StringLengthValidator;
import org.jboss.as.controller.registry.AttributeAccess;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.logging.Logger;
/**
* Attribute handler for cache-container resource.
*
* @author Richard Achmatowicz (c) 2011 Red Hat Inc.
*/
public class CacheContainerWriteAttributeHandler implements OperationStepHandler {
private static final Logger log = Logger.getLogger(CacheContainerWriteAttributeHandler.class.getPackage().getName());
public static final CacheContainerWriteAttributeHandler INSTANCE = new CacheContainerWriteAttributeHandler();
private final ParametersValidator nameValidator = new ParametersValidator();
private final Map<String, AttributeDefinition> attributeDefinitions;
private CacheContainerWriteAttributeHandler() {
this(CommonAttributes.CACHE_CONTAINER_ATTRIBUTES);
}
private CacheContainerWriteAttributeHandler(final AttributeDefinition... definitions) {
assert definitions != null : MESSAGES.nullVar("definitions").getLocalizedMessage();
attributeDefinitions = new HashMap<String, AttributeDefinition>();
for (AttributeDefinition def : definitions) {
attributeDefinitions.put(def.getName(), def);
}
}
/**
* An attribute write handler which performs special processing for ALIAS attributes.
*
* @param context the operation context
* @param operation the operation being executed
* @throws OperationFailedException
*/
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
nameValidator.validate(operation);
final String attributeName = operation.require(NAME).asString();
// Don't require VALUE. Let the validator decide if it's bothered by an undefined value
ModelNode newValue = operation.hasDefined(VALUE) ? operation.get(VALUE) : new ModelNode();
final ModelNode submodel = context.readResourceForUpdate(PathAddress.EMPTY_ADDRESS).getModel();
final ModelNode currentValue = submodel.get(attributeName).clone();
// for the attribute ALIAS, add the aliases in newValue to the current value
if (attributeName.equals(ModelKeys.ALIAS)) {
newValue = createAliasList(newValue.asString()) ;
}
final AttributeDefinition attributeDefinition = getAttributeDefinition(attributeName);
if (attributeDefinition != null) {
final ModelNode syntheticOp = new ModelNode();
syntheticOp.get(attributeName).set(newValue);
attributeDefinition.validateAndSet(syntheticOp, submodel);
} else {
submodel.get(attributeName).set(newValue);
}
// since we modified the model, set reload required
if (requiresRuntime(context)) {
context.addStep(new OperationStepHandler() {
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
context.reloadRequired();
context.completeStep();
}
}, OperationContext.Stage.RUNTIME);
}
context.completeStep();
}
/**
* Gets whether a {@link OperationContext.Stage#RUNTIME} handler should be added. This default implementation
* returns {@code true} if the {@link OperationContext#getType() context type} is {@link OperationContext.Type#SERVER}
* and {@link OperationContext#isBooting() context.isBooting()} returns {@code false}.
*
* @param context operation context
* @return {@code true} if a runtime stage handler should be added; {@code false} otherwise.
*/
protected boolean requiresRuntime(OperationContext context) {
return context.getType() == OperationContext.Type.SERVER && !context.isBooting();
}
protected AttributeDefinition getAttributeDefinition(final String attributeName) {
return attributeDefinitions == null ? null : attributeDefinitions.get(attributeName);
}
public void registerAttributes(final ManagementResourceRegistration registry) {
final EnumSet<AttributeAccess.Flag> flags = EnumSet.of(AttributeAccess.Flag.RESTART_ALL_SERVICES);
for (AttributeDefinition attr : CommonAttributes.CACHE_CONTAINER_ATTRIBUTES) {
registry.registerReadWriteAttribute(attr.getName(), CacheContainerReadAttributeHandler.INSTANCE, this, flags);
}
}
/**
* Creates a new ModelNode representing the list of aliases.
*
* @param aliasString comma-delimited list of new aliases to add
* @return LIST ModelNode with the added aliases
*/
private ModelNode createAliasList(String aliasString) {
// check for empty string
if (aliasString == null || aliasString.equals(""))
return new ModelNode() ;
final String ALIAS_SEPARATOR = ",";
ModelNode newList = new ModelNode() ;
String[] aliases = aliasString.split(ALIAS_SEPARATOR) ;
for (String alias : aliases) {
newList.add().set(alias) ;
}
return newList ;
}
}