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ActivateSubjectStrategy.java
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ActivateSubjectStrategy.java
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/*
* Copyright (c) 2019 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.services.policies.persistence.actors.strategies.commands;
import static org.eclipse.ditto.model.base.common.ConditionChecker.checkNotNull;
import java.util.Optional;
import javax.annotation.Nullable;
import org.eclipse.ditto.model.base.entity.metadata.Metadata;
import org.eclipse.ditto.model.base.exceptions.DittoRuntimeException;
import org.eclipse.ditto.model.base.headers.DittoHeaders;
import org.eclipse.ditto.model.base.headers.entitytag.EntityTag;
import org.eclipse.ditto.model.policies.Label;
import org.eclipse.ditto.model.policies.Policy;
import org.eclipse.ditto.model.policies.PolicyEntry;
import org.eclipse.ditto.model.policies.PolicyId;
import org.eclipse.ditto.model.policies.Subject;
import org.eclipse.ditto.model.policies.SubjectExpiry;
import org.eclipse.ditto.model.policies.SubjectId;
import org.eclipse.ditto.services.models.policies.PoliciesValidator;
import org.eclipse.ditto.services.policies.common.config.PolicyConfig;
import org.eclipse.ditto.services.policies.persistence.actors.placeholders.PolicyEntryPlaceholder;
import org.eclipse.ditto.services.utils.persistentactors.results.Result;
import org.eclipse.ditto.services.utils.persistentactors.results.ResultFactory;
import org.eclipse.ditto.signals.commands.policies.modify.ActivateSubject;
import org.eclipse.ditto.signals.commands.policies.modify.ActivateSubjectResponse;
import org.eclipse.ditto.signals.events.policies.PolicyEvent;
import org.eclipse.ditto.signals.events.policies.SubjectActivated;
/**
* This strategy handles the {@link org.eclipse.ditto.signals.commands.policies.modify.ActivateSubject} command.
*/
final class ActivateSubjectStrategy extends AbstractPolicyCommandStrategy<ActivateSubject> {
ActivateSubjectStrategy(final PolicyConfig policyConfig) {
super(ActivateSubject.class, policyConfig);
}
@Override
protected Result<PolicyEvent> doApply(final Context<PolicyId> context,
@Nullable final Policy policy,
final long nextRevision,
final ActivateSubject command,
@Nullable final Metadata metadata) {
final Policy nonNullPolicy = checkNotNull(policy, "policy");
final PolicyId policyId = context.getState();
final Label label = command.getLabel();
final SubjectExpiry commandSubjectExpiry = SubjectExpiry.newInstance(command.getExpiry());
final DittoHeaders dittoHeaders = command.getDittoHeaders();
final Optional<PolicyEntry> optionalEntry = nonNullPolicy.getEntryFor(label);
if (optionalEntry.isPresent()) {
final SubjectId subjectId;
try {
subjectId = PolicyEntryPlaceholder.resolveSubjectId(optionalEntry.get(), command.getSubjectId());
} catch (final DittoRuntimeException e) {
return ResultFactory.newErrorResult(e, command);
}
final Subject subject = Subject.newInstance(subjectId, TOKEN_INTEGRATION, commandSubjectExpiry);
final Subject adjustedSubject = potentiallyAdjustSubject(subject);
final ActivateSubject adjustedCommand = ActivateSubject.of(
command.getEntityId(), command.getLabel(), adjustedSubject.getId(),
adjustedSubject.getExpiry().orElseThrow().getTimestamp(), dittoHeaders);
// Validation is necessary because activation may add expiry to the policy admin subject.
final Policy newPolicy = nonNullPolicy.setSubjectFor(label, adjustedSubject);
final PoliciesValidator validator = PoliciesValidator.newInstance(newPolicy);
if (validator.isValid()) {
final PolicyEvent<?> event =
SubjectActivated.of(policyId, label, adjustedSubject, nextRevision, getEventTimestamp(),
dittoHeaders);
final ActivateSubjectResponse rawResponse =
ActivateSubjectResponse.of(policyId, label, adjustedSubject.getId(), dittoHeaders);
// do not append ETag - activated subjects do not support ETags.
return ResultFactory.newMutationResult(adjustedCommand, event, rawResponse);
} else {
return ResultFactory.newErrorResult(
policyEntryInvalid(policyId, label, validator.getReason().orElse(null), dittoHeaders),
command);
}
} else {
return ResultFactory.newErrorResult(policyEntryNotFound(policyId, label, dittoHeaders), command);
}
}
@Override
public Optional<EntityTag> previousEntityTag(final ActivateSubject command, @Nullable final Policy previousEntity) {
// activated subjects do not support entity tag
return Optional.empty();
}
@Override
public Optional<EntityTag> nextEntityTag(final ActivateSubject command, @Nullable final Policy newEntity) {
// activated subjects do not support entity tag
return Optional.empty();
}
}