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/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-------------------------------------------------------------------------
*
* Copyright (c) 2004-2011, PostgreSQL Global Development Group
*
*
*-------------------------------------------------------------------------
*/
package com.impossibl.postgres.protocol;
import com.impossibl.postgres.system.Context;
import com.impossibl.postgres.types.Type;
import com.impossibl.postgres.utils.Await;
import com.impossibl.postgres.utils.BlockingReadTimeoutException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import static java.util.concurrent.TimeUnit.SECONDS;
import static io.netty.util.ReferenceCountUtil.retain;
public class RequestExecutorHandlers {
public abstract static class Result implements RequestExecutor.ErrorHandler {
protected Throwable error;
protected List notices = new ArrayList<>();
protected CountDownLatch completed = new CountDownLatch(1);
public boolean isValid() {
checkCompleted();
return error != null;
}
public Throwable getError() {
checkCompleted();
return error;
}
public List getNotices() {
checkCompleted();
return notices;
}
@Override
public void handleError(Throwable error, List notices) {
this.error = error;
this.notices = notices;
completed.countDown();
}
public boolean isCompleted() {
try {
return completed.await(0, SECONDS);
}
catch (InterruptedException ignored) {
return false;
}
}
void checkCompleted() {
try {
if (completed.await(0, SECONDS))
return;
}
catch (InterruptedException ignored) {
}
throw new IllegalStateException("Result has not completed.");
}
private void rethrowError() throws IOException {
if (error == null) return;
if (error instanceof IOException) {
throw (IOException) error;
}
if (error instanceof RuntimeException) {
throw (RuntimeException) error;
}
throw new RuntimeException(error);
}
public void await(long timeout, TimeUnit unit) throws IOException {
if (!Await.awaitUninterruptibly(timeout, unit, completed::await)) {
throw new BlockingReadTimeoutException();
}
rethrowError();
}
}
public static class SynchronizedResult extends Result implements RequestExecutor.SynchronizedHandler {
@Override
public void handleReady(TransactionStatus transactionStatus) {
completed.countDown();
}
}
public static class PrepareResult extends Result implements RequestExecutor.PrepareHandler {
private TypeRef[] describedParameterTypes;
private ResultField[] describedResultFields;
public Type[] getDescribedParameterTypes(Context context) throws IOException {
checkCompleted();
List list = new ArrayList<>();
for (TypeRef ref : describedParameterTypes) {
Type resolve = context.getRegistry().resolve(ref);
list.add(resolve);
}
return list.toArray(new Type[0]);
}
public ResultField[] getDescribedResultFields() {
checkCompleted();
return describedResultFields;
}
@Override
public void handleComplete(TypeRef[] parameterTypes, ResultField[] resultFields, List notices) {
this.describedParameterTypes = parameterTypes;
this.describedResultFields = resultFields;
this.notices = notices;
completed.countDown();
}
}
public abstract static class AnyQueryResult extends SynchronizedResult {
public abstract boolean isSuspended();
public abstract ResultBatch getBatch();
}
public static class QueryResult extends AnyQueryResult implements RequestExecutor.ExtendedQueryHandler {
private boolean synced;
private boolean suspended;
private ResultBatch resultBatch;
public QueryResult() {
this(true);
}
public QueryResult(boolean synced) {
this.synced = synced;
}
@Override
public boolean isSuspended() {
return suspended;
}
@Override
public ResultBatch getBatch() {
checkCompleted();
return resultBatch;
}
@Override
public void handleComplete(String command, Long rowsAffected, Long insertedOid, TypeRef[] parameterTypes, ResultField[] resultFields, RowDataSet rows, List notices) {
this.resultBatch = new ResultBatch(command, rowsAffected, insertedOid, resultFields, retain(rows));
this.notices = notices;
if (!synced) {
completed.countDown();
}
}
@Override
public void handleSuspend(TypeRef[] parameterTypes, ResultField[] resultFields, RowDataSet rows, List notices) {
this.resultBatch = new ResultBatch(null, null, null, resultFields, retain(rows));
this.notices = notices;
suspended = true;
completed.countDown();
}
}
public static class ExecuteResult extends AnyQueryResult implements RequestExecutor.ExecuteHandler {
private boolean synced;
private boolean suspended;
private ResultField[] describedResultFields;
private ResultBatch resultBatch;
public ExecuteResult(ResultField[] describedResultFields) {
this(true, describedResultFields);
}
public ExecuteResult(boolean synced, ResultField[] describedResultFields) {
this.synced = synced;
this.describedResultFields = describedResultFields;
}
@Override
public boolean isSuspended() {
return suspended;
}
@Override
public ResultBatch getBatch() {
checkCompleted();
return resultBatch;
}
@Override
public void handleComplete(String command, Long rowsAffected, Long insertedOid, RowDataSet rows, List notices) {
this.resultBatch = new ResultBatch(command, rowsAffected, insertedOid, describedResultFields, retain(rows));
this.notices = notices;
if (!synced) {
completed.countDown();
}
}
@Override
public void handleSuspend(RowDataSet rows, List notices) {
this.resultBatch = new ResultBatch(null, null, null, describedResultFields, retain(rows));
suspended = true;
completed.countDown();
}
}
public static class CompositeQueryResults extends SynchronizedResult implements RequestExecutor.QueryHandler {
private List resultBatches;
public CompositeQueryResults() {
resultBatches = new ArrayList<>();
}
public List getBatches() {
return resultBatches;
}
@Override
public void handleComplete(String command, Long rowsAffected, Long insertedOid, TypeRef[] parameterTypes, ResultField[] resultFields, RowDataSet rows, List notices) {
resultBatches.add(new ResultBatch(command, rowsAffected, insertedOid, resultFields, retain(rows)));
this.notices.addAll(notices);
}
}
}