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The Reactive PostgreSQL Client
/*
* Copyright (C) 2018 Julien Viet
*
* 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.vertx.pgclient.impl.codec;
import io.vertx.sqlclient.impl.TupleInternal;
import io.vertx.sqlclient.impl.codec.InvalidCachedStatementEvent;
import io.vertx.sqlclient.impl.RowDesc;
import io.vertx.sqlclient.impl.command.CommandResponse;
import io.vertx.sqlclient.impl.command.ExtendedQueryCommand;
class ExtendedQueryCommandCodec> extends QueryCommandBaseCodec {
private PgEncoder encoder;
private static final String TABLE_SCHEMA_CHANGE_ERROR_MESSAGE_PATTERN = "bind message has \\d result formats but query has \\d columns";
ExtendedQueryCommandCodec(C cmd) {
super(cmd);
decoder = new RowResultDecoder<>(cmd.collector(), ((PgPreparedStatement)cmd.preparedStatement()).rowDesc());
}
@Override
void encode(PgEncoder encoder) {
this.encoder = encoder;
if (cmd.isSuspended()) {
encoder.writeExecute(cmd.cursorId(), cmd.fetch());
encoder.writeSync();
} else {
PgPreparedStatement ps = (PgPreparedStatement) cmd.preparedStatement();
if (cmd.isBatch()) {
if (cmd.paramsList().isEmpty()) {
// We set suspended to false as we won't get a command complete command back from Postgres
this.result = false;
completionHandler.handle(CommandResponse.failure("Can not execute batch query with 0 sets of batch parameters."));
return;
} else {
for (TupleInternal param : cmd.paramsList()) {
encoder.writeBind(ps.bind, cmd.cursorId(), param);
encoder.writeExecute(cmd.cursorId(), cmd.fetch());
}
}
} else {
encoder.writeBind(ps.bind, cmd.cursorId(), cmd.params());
encoder.writeExecute(cmd.cursorId(), cmd.fetch());
}
encoder.writeSync();
}
}
@Override
void handleParseComplete() {
// Response to Parse
}
@Override
void handlePortalSuspended() {
Throwable failure = decoder.complete();
R result = decoder.result();
RowDesc desc = decoder.desc;
int size = decoder.size();
decoder.reset();
this.result = true;
cmd.resultHandler().handleResult(0, size, desc, result, failure);
}
@Override
void handleBindComplete() {
// Response to Bind
}
@Override
public void handleErrorResponse(ErrorResponse errorResponse) {
if (((PgPreparedStatement)cmd.preparedStatement()).isCached() && isTableSchemaErrorMessage(errorResponse)) {
encoder.channelHandlerContext().fireChannelRead(new InvalidCachedStatementEvent(cmd.preparedStatement().sql()));
}
super.handleErrorResponse(errorResponse);
}
private boolean isTableSchemaErrorMessage(ErrorResponse errorResponse) {
return errorResponse.getMessage().matches(TABLE_SCHEMA_CHANGE_ERROR_MESSAGE_PATTERN) || errorResponse.getMessage().equals("cached plan must not change result type");
}
}
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