/jboss-as-7.1.1.Final/controller/src/main/java/org/jboss/as/controller/operations/common/ProcessEnvironment.java
Java | 186 lines | 86 code | 28 blank | 72 comment | 12 complexity | 18339de8f10c455b044f40ceeb6cbbd2 MD5 | raw file
Possible License(s): LGPL-2.1, Apache-2.0
- /*
- * JBoss, Home of Professional Open Source.
- * Copyright 2011, Red Hat, Inc., and individual contributors
- * as indicated by the @author tags. See the copyright.txt file in the
- * distribution for a full listing of individual contributors.
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this software; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
- */
- package org.jboss.as.controller.operations.common;
- import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.VALUE;
- import java.net.InetAddress;
- import java.net.UnknownHostException;
- import java.util.UUID;
- import org.jboss.as.controller.AttributeDefinition;
- import org.jboss.as.controller.ControlledProcessState;
- import org.jboss.as.controller.ControllerMessages;
- 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.SimpleAttributeDefinitionBuilder;
- import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
- import org.jboss.as.controller.interfaces.InetAddressUtil;
- import org.jboss.dmr.ModelNode;
- import org.jboss.dmr.ModelType;
- /**
- * Base class for objects that store environment information for a process.
- *
- * @author Brian Stansberry (c) 2011 Red Hat Inc.
- */
- public abstract class ProcessEnvironment {
- /** The special process name value that triggers calculation of a UUID */
- public static final String JBOSS_DOMAIN_UUID = "jboss.domain.uuid";
- /** {@link AttributeDefinition} for the {@code name} attribute for a processes root resource */
- public static final AttributeDefinition NAME = new SimpleAttributeDefinitionBuilder(ModelDescriptionConstants.NAME, ModelType.STRING, true)
- .setAllowExpression(true).build();
- /**
- * Gets an {@link OperationStepHandler} that can read the {@code name} attribute for a processes root resource
- * @return the handler
- */
- public OperationStepHandler getProcessNameReadHandler() {
- return new ProcessNameReadAttributeHandler();
- }
- /**
- * Gets an {@link OperationStepHandler} that can write the {@code name} attribute for a processes root resource
- * @return the handler
- */
- public OperationStepHandler getProcessNameWriteHandler() {
- return new ProcessNameWriteAttributeHandler();
- }
- /**
- * Gets the resolved name of this process; a value previously passed to {@link #setProcessName(String)} or
- * a value derived from the environment.
- *
- * @return the process name. Cannot be {@code null}
- */
- protected abstract String getProcessName();
- /**
- * Sets the process name. This method can only be called by the handler returned by
- * {@link #getProcessNameWriteHandler()}; its visibility is protected only because subclasses need to implement it.
- *
- * @param processName the process name. May be {@code null} in which case a default process name should be used.
- */
- protected abstract void setProcessName(String processName);
- /**
- * Gets whether updating the runtime system properties with the given property is allowed.
- *
- * @param propertyName the name of the property. Cannot be {@code null}
- * @param propertyValue the value of the property. May be {@code null}
- * @param bootTime {@code true} if the process is currently booting
- *
- * @return {@code true} if the update can be applied to the runtime system properties; {@code} false if it
- * should just be stored in the persistent configuration and the process should be put into
- * {@link ControlledProcessState.State#RELOAD_REQUIRED reload-required state}.
- *
- * @throws OperationFailedException if a change to the given property is not allowed at all; e.g. changing
- * {@code jboss.server.base.dir} after primordial boot is not allowed; the
- * property can only be set from the command line
- */
- protected abstract boolean isRuntimeSystemPropertyUpdateAllowed(String propertyName,
- String propertyValue,
- boolean bootTime) throws OperationFailedException;
- /**
- * Notifies this {@code ProcessEnvironment} that the runtime value of the given system property has been updated,
- * allowing it to update any state that was originally set via the system property during primordial process boot.
- * This method should only be invoked after a call to {@link #isRuntimeSystemPropertyUpdateAllowed(String, String, boolean)}
- * has returned {@code true}.
- *
- * @param propertyName the name of the property. Cannot be {@code null}
- * @param propertyValue the value of the property. May be {@code null}
- */
- protected abstract void systemPropertyUpdated(String propertyName, String propertyValue);
- protected static String resolveGUID(final String unresolvedName) {
- String result;
- if (JBOSS_DOMAIN_UUID.equals(unresolvedName)) {
- try {
- InetAddress localhost = InetAddressUtil.getLocalHost();
- result = UUID.nameUUIDFromBytes(localhost.getAddress()).toString();
- } catch (UnknownHostException e) {
- throw ControllerMessages.MESSAGES.cannotResolveProcessUUID(e);
- }
- } else {
- result = unresolvedName;
- }
- return result;
- }
- private class ProcessNameWriteAttributeHandler implements OperationStepHandler {
- @Override
- public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
- final ModelNode model = context.readResourceForUpdate(PathAddress.EMPTY_ADDRESS).getModel();
- final ModelNode newValue = operation.hasDefined(VALUE) ? operation.get(VALUE) : new ModelNode();
- final ModelNode mockOp = new ModelNode();
- mockOp.get(NAME.getName()).set(newValue);
- NAME.validateAndSet(mockOp, model);
- boolean booting = context.isBooting();
- String resolved = null;
- if (context.isBooting()) {
- final ModelNode resolvedNode = NAME.resolveModelAttribute(context, model);
- resolved = resolvedNode.isDefined() ? resolvedNode.asString() : null;
- resolved = resolved == null ? null : resolveGUID(resolved);
- } else {
- context.reloadRequired();
- }
- if (context.completeStep() == OperationContext.ResultAction.KEEP) {
- if (booting) {
- ProcessEnvironment.this.setProcessName(resolved);
- }
- } else if (!booting) {
- context.revertReloadRequired();
- }
- }
- }
- private class ProcessNameReadAttributeHandler implements OperationStepHandler {
- @Override
- public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
- final ModelNode model = context.readResource(PathAddress.EMPTY_ADDRESS).getModel();
- if (model.hasDefined(NAME.getName())) {
- context.getResult().set(model.get(NAME.getName()));
- } else {
- context.getResult().set(ProcessEnvironment.this.getProcessName());
- }
- context.completeStep(OperationContext.RollbackHandler.NOOP_ROLLBACK_HANDLER);
- }
- }
- }