io.grpc.ChannelLogger Maven / Gradle / Ivy
/*
* Copyright 2018 The gRPC 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
*
* 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.grpc;
import javax.annotation.concurrent.ThreadSafe;
/**
* A Channel-specific logger provided by GRPC library to {@link LoadBalancer} implementations.
* Information logged here goes to Channelz, and to the Java logger of this class
* as well.
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/5029")
@ThreadSafe
public abstract class ChannelLogger {
/**
* Log levels. See the table below for the mapping from the ChannelLogger levels to Channelz
* severity level (see {@code ChannelTraceEvent} from channelz.proto)
* and Java logger levels. Note that {@code DEBUG} level is not recorded on Channelz.
*
* +---------------------+-------------------+-------------------+
* | ChannelLogger Level | Channelz Severity | Java Logger Level |
* +---------------------+-------------------+-------------------+
* | DEBUG | N/A | FINEST |
* | INFO | CT_INFO | FINER |
* | WARNING | CT_WARNING | FINE |
* | ERROR | CT_ERROR | FINE |
* +---------------------+-------------------+-------------------+
*
*/
public enum ChannelLogLevel {
DEBUG,
INFO,
WARNING,
ERROR
}
/**
* Logs a message.
*/
public abstract void log(ChannelLogLevel level, String message);
/**
* Logs a message, using a message format and a list of arguments used to generate the log
* message with {@link java.text.MessageFormat}.
*/
public abstract void log(ChannelLogLevel level, String messageFormat, Object... args);
}