io.r2dbc.postgresql.client.CancelRequestMessageFlow Maven / Gradle / Ivy
/*
* Copyright 2017-2020 the original author or authors.
*
* 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
*
* https://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.r2dbc.postgresql.client;
import io.r2dbc.postgresql.message.backend.BackendMessage;
import io.r2dbc.postgresql.message.frontend.CancelRequest;
import io.r2dbc.postgresql.util.Assert;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
/**
* A utility class that encapsulates the Cancel Request message flow.
*/
public final class CancelRequestMessageFlow {
private CancelRequestMessageFlow() {
}
/**
* Execute the Cancel Request message flow.
*
* @param client the {@link Client} to exchange messages with
* @return the messages received after authentication is complete, in response to this exchange
* @throws IllegalArgumentException if {@code Client} is {@code null}
*/
public static Flux exchange(Client client) {
Assert.requireNonNull(client, "client must not be null");
int processId = client.getProcessId().orElseThrow(() -> new IllegalStateException("Connection does not yet have a processId"));
int secretKey = client.getSecretKey().orElseThrow(() -> new IllegalStateException("Connection does not yet have a secretKey"));
return client.exchange(Mono.just(new CancelRequest(processId, secretKey)));
}
}