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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* 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 io.fd.honeycomb.v3po.data.impl;
import static org.opendaylight.controller.md.sal.common.api.TransactionStatus.CANCELED;
import static org.opendaylight.controller.md.sal.common.api.TransactionStatus.COMMITED;
import static org.opendaylight.controller.md.sal.common.api.TransactionStatus.FAILED;
import static org.opendaylight.controller.md.sal.common.api.TransactionStatus.NEW;
import static org.opendaylight.controller.md.sal.common.api.TransactionStatus.SUBMITED;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import io.fd.honeycomb.v3po.data.ModifiableDataTree;
import io.fd.honeycomb.v3po.data.DataTreeSnapshot;
import io.fd.honeycomb.v3po.translate.TranslationException;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.NotThreadSafe;
import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@NotThreadSafe
final class WriteTransaction implements DOMDataWriteTransaction {
private static final Logger LOG = LoggerFactory.getLogger(WriteTransaction.class);
private final ModifiableDataTree configDataTree;
private DataTreeModification modification;
private TransactionStatus status;
WriteTransaction(@Nonnull final ModifiableDataTree configDataTree,
@Nonnull final DataTreeSnapshot configSnapshot) {
this.configDataTree = Preconditions.checkNotNull(configDataTree, "configDataTree should not be null");
Preconditions.checkNotNull(configSnapshot, "configSnapshot should not be null");
// initialize transaction state:
modification = configSnapshot.newModification();
status = NEW;
}
WriteTransaction(@Nonnull final ModifiableDataTree configDataTree) {
this(configDataTree, configDataTree.takeSnapshot());
}
private static void checkConfigurationWrite(final LogicalDatastoreType store) {
Preconditions.checkArgument(LogicalDatastoreType.CONFIGURATION == store, "Write is not supported for operational data store");
}
private void checkIsNew() {
Preconditions.checkState(status == NEW, "Transaction was submitted or canceled");
Preconditions.checkState(modification != null, "DataTree modification should not be null");
}
@Override
public void put(final LogicalDatastoreType store, final YangInstanceIdentifier path,
final NormalizedNode<?, ?> data) {
LOG.debug("WriteTransaction.put() store={}, path={}, data={}", store, path, data);
checkIsNew();
checkConfigurationWrite(store);
modification.write(path, data);
}
@Override
public void merge(final LogicalDatastoreType store, final YangInstanceIdentifier path,
final NormalizedNode<?, ?> data) {
LOG.debug("WriteTransaction.merge() store={}, path={}, data={}", store, path, data);
checkIsNew();
checkConfigurationWrite(store);
modification.merge(path, data);
}
@Override
public boolean cancel() {
if (status != NEW) {
// only NEW transactions can be cancelled
return false;
} else {
status = CANCELED;
modification = null;
return true;
}
}
@Override
public void delete(LogicalDatastoreType store, final YangInstanceIdentifier path) {
LOG.debug("WriteTransaction.delete() store={}, path={}", store, path);
checkIsNew();
checkConfigurationWrite(store);
modification.delete(path);
}
@Override
public CheckedFuture<Void, TransactionCommitFailedException> submit() {
LOG.debug("WriteTransaction.submit()");
checkIsNew();
// seal transaction:
modification.ready();
status = SUBMITED;
try {
configDataTree.modify(modification);
status = COMMITED;
} catch (DataValidationFailedException | TranslationException e) {
status = FAILED;
LOG.error("Failed modify data tree", e);
return Futures.immediateFailedCheckedFuture(
new TransactionCommitFailedException("Failed to validate DataTreeModification", e));
} finally {
modification = null;
}
return Futures.immediateCheckedFuture(null);
}
@Override
@Deprecated
public ListenableFuture<RpcResult<TransactionStatus>> commit() {
throw new UnsupportedOperationException("deprecated");
}
@Override
public Object getIdentifier() {
return this;
}
}
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