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/*******************************************************************************
* Copyright (c) 2007, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.engine;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.core.helpers.LogHelper;
import org.eclipse.equinox.internal.provisional.p2.core.eventbus.IProvisioningEventBus;
import org.eclipse.equinox.p2.core.IProvisioningAgent;
import org.eclipse.equinox.p2.engine.*;
/**
* Concrete implementation of the {@link IEngine} API.
*/
public class Engine implements IEngine {
private static final String ENGINE = "engine"; //$NON-NLS-1$
private IProvisioningAgent agent;
public Engine(IProvisioningAgent agent) {
this.agent = agent;
agent.registerService(ActionManager.SERVICE_NAME, new ActionManager());
}
private void checkArguments(IProfile iprofile, PhaseSet phaseSet, Operand[] operands) {
if (iprofile == null)
throw new IllegalArgumentException(Messages.null_profile);
if (phaseSet == null)
throw new IllegalArgumentException(Messages.null_phaseset);
if (operands == null)
throw new IllegalArgumentException(Messages.null_operands);
}
@Override
public IStatus perform(IProvisioningPlan plan, IPhaseSet phaseSet, IProgressMonitor monitor) {
return perform(plan.getProfile(), phaseSet, ((ProvisioningPlan) plan).getOperands(), plan.getContext(), monitor);
}
@Override
public IStatus perform(IProvisioningPlan plan, IProgressMonitor monitor) {
return perform(plan, PhaseSetFactory.createDefaultPhaseSet(), monitor);
}
public IStatus perform(IProfile iprofile, IPhaseSet phases, Operand[] operands, ProvisioningContext context, IProgressMonitor monitor) {
PhaseSet phaseSet = (PhaseSet) phases;
checkArguments(iprofile, phaseSet, operands);
if (operands.length == 0)
return Status.OK_STATUS;
SimpleProfileRegistry profileRegistry = (SimpleProfileRegistry) agent.getService(IProfileRegistry.SERVICE_NAME);
IProvisioningEventBus eventBus = (IProvisioningEventBus) agent.getService(IProvisioningEventBus.SERVICE_NAME);
if (context == null)
context = new ProvisioningContext(agent);
if (monitor == null)
monitor = new NullProgressMonitor();
Profile profile = profileRegistry.validate(iprofile);
profileRegistry.lockProfile(profile);
try {
eventBus.publishEvent(new BeginOperationEvent(profile, phaseSet, operands, this));
if (DebugHelper.DEBUG_ENGINE)
DebugHelper.debug(ENGINE, "Beginning engine operation for profile=" + profile.getProfileId() + " [" + profile.getTimestamp() + "]:" + DebugHelper.LINE_SEPARATOR + DebugHelper.formatOperation(phaseSet, operands, context)); //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
EngineSession session = new EngineSession(agent, profile, context);
MultiStatus result = phaseSet.perform(session, operands, monitor);
if (result.isOK() || result.matches(IStatus.INFO | IStatus.WARNING)) {
if (DebugHelper.DEBUG_ENGINE)
DebugHelper.debug(ENGINE, "Preparing to commit engine operation for profile=" + profile.getProfileId()); //$NON-NLS-1$
result.merge(session.prepare(monitor));
}
if (result.matches(IStatus.ERROR | IStatus.CANCEL)) {
if (DebugHelper.DEBUG_ENGINE)
DebugHelper.debug(ENGINE, "Rolling back engine operation for profile=" + profile.getProfileId() + ". Reason was: " + result.toString()); //$NON-NLS-1$ //$NON-NLS-2$
IStatus status = session.rollback(monitor, result.getSeverity());
if (status.matches(IStatus.ERROR))
LogHelper.log(status);
eventBus.publishEvent(new RollbackOperationEvent(profile, phaseSet, operands, this, result));
} else {
if (DebugHelper.DEBUG_ENGINE)
DebugHelper.debug(ENGINE, "Committing engine operation for profile=" + profile.getProfileId()); //$NON-NLS-1$
if (profile.isChanged())
profileRegistry.updateProfile(profile);
IStatus status = session.commit(monitor);
if (status.matches(IStatus.ERROR))
LogHelper.log(status);
eventBus.publishEvent(new CommitOperationEvent(profile, phaseSet, operands, this));
}
//if there is only one child status, return that status instead because it will have more context
IStatus[] children = result.getChildren();
return children.length == 1 ? children[0] : result;
} finally {
profileRegistry.unlockProfile(profile);
profile.setChanged(false);
}
}
protected IStatus validate(IProfile iprofile, PhaseSet phaseSet, Operand[] operands, ProvisioningContext context, IProgressMonitor monitor) {
checkArguments(iprofile, phaseSet, operands);
if (context == null)
context = new ProvisioningContext(agent);
if (monitor == null)
monitor = new NullProgressMonitor();
ActionManager actionManager = (ActionManager) agent.getService(ActionManager.SERVICE_NAME);
return phaseSet.validate(actionManager, iprofile, operands, context, monitor);
}
@Override
public IProvisioningPlan createPlan(IProfile profile, ProvisioningContext context) {
return new ProvisioningPlan(profile, null, context);
}
}
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