/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.hops.transaction.context;
import io.hops.exception.StorageCallPreventedException;
import io.hops.exception.StorageException;
import io.hops.exception.TransactionContextException;
import io.hops.metadata.common.FinderType;
import io.hops.metadata.election.dal.LeDescriptorDataAccess;
import io.hops.metadata.election.entity.LeDescriptor;
import io.hops.transaction.lock.TransactionLocks;
import java.util.ArrayList;
import java.util.Collection;
public abstract class LeSnapshot extends BaseEntityContext<Long, LeDescriptor> {
private final LeDescriptorDataAccess<LeDescriptor> dataAccess;
private boolean allRead = false;
public LeSnapshot(LeDescriptorDataAccess dataAccess) {
this.dataAccess = dataAccess;
}
@Override
public void update(LeDescriptor desc) throws TransactionContextException {
super.update(desc);
log("added-le-desc", "id", desc.getId(), "hostName", desc.getHostName(),
"counter", desc.getCounter());
}
@Override
public void remove(LeDescriptor desc) throws TransactionContextException {
super.remove(desc);
log("removed-le-desc", "id", desc.getId(), "hostName", desc.getHostName(),
"counter", desc.getCounter());
}
@Override
public void prepare(TransactionLocks tlm)
throws TransactionContextException, StorageException {
dataAccess.prepare(getRemoved(), getAdded(), getModified());
}
@Override
public void clear() throws TransactionContextException {
super.clear();
allRead = false;
}
@Override
Long getKey(LeDescriptor desc) {
return desc.getId();
}
protected LeDescriptor findById(LeDescriptor.LeDescriptorFinder lFinder,
Object[] params) throws StorageCallPreventedException, StorageException {
final long id = (Long) params[0];
final int partitionKey = (Integer) params[1];
LeDescriptor result = null;
if (allRead || contains(id)) {
result = get(id);
hit(lFinder, result, "id", id);
} else {
aboutToAccessStorage(lFinder, params);
result = dataAccess.findByPkey(id, partitionKey);
gotFromDB(id, result);
miss(lFinder, result, "id", id);
}
return result;
}
protected Collection<LeDescriptor> findAll(
LeDescriptor.LeDescriptorFinder lFinder)
throws StorageCallPreventedException, StorageException {
Collection<LeDescriptor> result = null;
if (allRead) {
result = getAll();
hit(lFinder, result);
} else {
aboutToAccessStorage(lFinder);
result = dataAccess.findAll();
allRead = true;
gotFromDB(result);
miss(lFinder, result);
}
return new ArrayList<LeDescriptor>(result);
}
public static class HdfsLESnapshot extends LeSnapshot {
public HdfsLESnapshot(LeDescriptorDataAccess dataAccess) {
super(dataAccess);
}
@Override
public LeDescriptor find(FinderType<LeDescriptor> finder, Object... params)
throws TransactionContextException, StorageException {
LeDescriptor.HdfsLeDescriptor.Finder lFinder =
(LeDescriptor.HdfsLeDescriptor.Finder) finder;
switch (lFinder) {
case ById:
return findById(lFinder, params);
}
throw new RuntimeException(UNSUPPORTED_FINDER);
}
@Override
public Collection<LeDescriptor> findList(FinderType<LeDescriptor> finder,
Object... params) throws TransactionContextException, StorageException {
LeDescriptor.HdfsLeDescriptor.Finder lFinder =
(LeDescriptor.HdfsLeDescriptor.Finder) finder;
switch (lFinder) {
case All:
return findAll(lFinder);
}
throw new RuntimeException(UNSUPPORTED_FINDER);
}
}
public static class YarnLESnapshot extends LeSnapshot {
public YarnLESnapshot(LeDescriptorDataAccess dataAccess) {
super(dataAccess);
}
@Override
public LeDescriptor find(FinderType<LeDescriptor> finder, Object... params)
throws TransactionContextException, StorageException {
LeDescriptor.YarnLeDescriptor.Finder lFinder =
(LeDescriptor.YarnLeDescriptor.Finder) finder;
switch (lFinder) {
case ById:
return findById(lFinder, params);
}
throw new RuntimeException(UNSUPPORTED_FINDER);
}
@Override
public Collection<LeDescriptor> findList(FinderType<LeDescriptor> finder,
Object... params) throws TransactionContextException, StorageException {
LeDescriptor.YarnLeDescriptor.Finder lFinder =
(LeDescriptor.YarnLeDescriptor.Finder) finder;
switch (lFinder) {
case All:
return findAll(lFinder);
}
throw new RuntimeException(UNSUPPORTED_FINDER);
}
}
}