/*
* Copyright 2015 JBoss, by Red Hat, Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.uberfire.ext.editor.commons.backend.service;
import java.util.Collection;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;
import javax.inject.Named;
import org.jboss.errai.bus.server.annotations.Service;
import org.jboss.errai.security.shared.api.identity.User;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.uberfire.backend.server.util.Paths;
import org.uberfire.backend.vfs.Path;
import org.uberfire.ext.editor.commons.backend.service.helper.DeleteHelper;
import org.uberfire.ext.editor.commons.service.DeleteService;
import org.uberfire.ext.editor.commons.service.restriction.PathOperationRestriction;
import org.uberfire.ext.editor.commons.service.restrictor.DeleteRestrictor;
import org.uberfire.io.IOService;
import org.uberfire.java.nio.base.options.CommentedOption;
import org.uberfire.java.nio.file.StandardDeleteOption;
import org.uberfire.rpc.SessionInfo;
@Service
@ApplicationScoped
public class DeleteServiceImpl implements DeleteService {
private static final Logger LOGGER = LoggerFactory.getLogger(DeleteServiceImpl.class);
private IOService ioService;
private User identity;
private SessionInfo sessionInfo;
private Instance<DeleteHelper> helpers;
private Instance<DeleteRestrictor> deleteRestrictorBeans;
public DeleteServiceImpl() {
//CDI proxies
}
@Inject
public DeleteServiceImpl(final @Named("ioStrategy") IOService ioService,
final User identity,
final SessionInfo sessionInfo,
final Instance<DeleteHelper> helpers,
final Instance<DeleteRestrictor> deleteRestrictorBeans) {
this.ioService = ioService;
this.identity = identity;
this.sessionInfo = sessionInfo;
this.helpers = helpers;
this.deleteRestrictorBeans = deleteRestrictorBeans;
}
@Override
public void delete(final Path path,
final String comment) {
LOGGER.info("User:" + identity.getIdentifier() + " deleting file [" + path.getFileName() + "]");
checkRestrictions(path);
try {
deletePath(path,
comment);
} catch (final Exception e) {
throw new RuntimeException(e);
}
}
@Override
public void deleteIfExists(final Collection<Path> paths,
final String comment) {
try {
startBatch(paths);
for (final Path path : paths) {
LOGGER.info("User:" + identity.getIdentifier() + " deleting file (if exists) [" + path.getFileName() + "]");
checkRestrictions(path);
deletePathIfExists(path,
comment);
}
} catch (final RuntimeException e) {
throw e;
} catch (final Exception e) {
throw new RuntimeException(e);
} finally {
endBatch(paths);
}
}
@Override
public boolean hasRestriction(final Path path) {
for (DeleteRestrictor deleteRestrictor : getDeleteRestrictors()) {
final PathOperationRestriction deleteRestriction = deleteRestrictor.hasRestriction(path);
if (deleteRestriction != null) {
return true;
}
}
return false;
}
private void checkRestrictions(final Path path) {
for (DeleteRestrictor deleteRestrictor : getDeleteRestrictors()) {
final PathOperationRestriction deleteRestriction = deleteRestrictor.hasRestriction(path);
if (deleteRestriction != null) {
throw new RuntimeException(deleteRestriction.getMessage(path));
}
}
}
void deletePath(final Path path,
final String comment) {
final org.uberfire.java.nio.file.Path _path = Paths.convert(path);
try {
ioService.startBatch(_path.getFileSystem());
// Delegate additional changes required for a deletion to applicable Helpers. Helpers are invoked before
// the deletion as Helpers may depend on the presence of the file; in particular when it is necessary to
// resolve a Package from a file name.
notifyDeleteHelpers(path);
ioService.delete(Paths.convert(path),
new CommentedOption(sessionInfo != null ? sessionInfo.getId() : "--",
identity.getIdentifier(),
null,
comment));
} catch (final Exception e) {
throw new RuntimeException(e);
} finally {
ioService.endBatch();
}
}
void deletePathIfExists(final Path path,
final String comment) {
// Delegate additional changes required for a deletion to applicable Helpers. Helpers are invoked before
// the deletion as Helpers may depend on the presence of the file; in particular when it is necessary to
// resolve a Package from a file name.
notifyDeleteHelpers(path);
ioService.deleteIfExists(Paths.convert(path),
new CommentedOption(sessionInfo.getId(),
identity.getIdentifier(),
null,
comment),
StandardDeleteOption.NON_EMPTY_DIRECTORIES
);
}
void notifyDeleteHelpers(final Path path) {
final Iterable<DeleteHelper> helpers = getDeleteHelpers();
if (helpers != null) {
for (DeleteHelper helper : helpers) {
if (helper.supports(path)) {
helper.postProcess(path);
}
}
}
}
void startBatch(final Collection<Path> paths) {
if (paths.size() > 1) {
ioService.startBatch(Paths.convert(paths.iterator().next()).getFileSystem());
}
}
void endBatch(final Collection<Path> paths) {
if (paths.size() > 1) {
ioService.endBatch();
}
}
Iterable<DeleteRestrictor> getDeleteRestrictors() {
return deleteRestrictorBeans;
}
Iterable<DeleteHelper> getDeleteHelpers() {
return helpers;
}
}