| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * 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 com.example.android.common.logger; |
| |
| /** |
| * Basic interface for a logging system that can output to one or more targets. |
| * Note that in addition to classes that will output these logs in some format, |
| * one can also implement this interface over a filter and insert that in the chain, |
| * such that no targets further down see certain data, or see manipulated forms of the data. |
| * You could, for instance, write a "ToHtmlLoggerNode" that just converted all the log data |
| * it received to HTML and sent it along to the next node in the chain, without printing it |
| * anywhere. |
| */ |
| public interface LogNode { |
| |
| /** |
| * Instructs first LogNode in the list to print the log data provided. |
| * @param priority Log level of the data being logged. Verbose, Error, etc. |
| * @param tag Tag for for the log data. Can be used to organize log statements. |
| * @param msg The actual message to be logged. The actual message to be logged. |
| * @param tr If an exception was thrown, this can be sent along for the logging facilities |
| * to extract and print useful information. |
| */ |
| public void println(int priority, String tag, String msg, Throwable tr); |
| |
| } |