| /* |
| * 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 org.apache.cassandra.utils; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public interface OutputHandler |
| { |
| // called when an important info need to be displayed |
| public void output(String msg); |
| |
| // called when a less important info need to be displayed |
| public void debug(String msg); |
| |
| // called when the user needs to be warn |
| public void warn(String msg); |
| public void warn(String msg, Throwable th); |
| |
| public static class LogOutput implements OutputHandler |
| { |
| private static Logger logger = LoggerFactory.getLogger(LogOutput.class); |
| |
| public void output(String msg) |
| { |
| logger.info(msg); |
| } |
| |
| public void debug(String msg) |
| { |
| logger.trace(msg); |
| } |
| |
| public void warn(String msg) |
| { |
| logger.warn(msg); |
| } |
| |
| public void warn(String msg, Throwable th) |
| { |
| logger.warn(msg, th); |
| } |
| } |
| |
| public static class SystemOutput implements OutputHandler |
| { |
| public final boolean debug; |
| public final boolean printStack; |
| |
| public SystemOutput(boolean debug, boolean printStack) |
| { |
| this.debug = debug; |
| this.printStack = printStack; |
| } |
| |
| public void output(String msg) |
| { |
| System.out.println(msg); |
| } |
| |
| public void debug(String msg) |
| { |
| if (debug) |
| System.out.println(msg); |
| } |
| |
| public void warn(String msg) |
| { |
| warn(msg, null); |
| } |
| |
| public void warn(String msg, Throwable th) |
| { |
| System.out.println("WARNING: " + msg); |
| if (printStack && th != null) |
| th.printStackTrace(System.out); |
| } |
| } |
| } |