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40 lines
1.8 KiB
40 lines
1.8 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.common.logger;
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/**
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* Basic interface for a logging system that can output to one or more targets.
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* Note that in addition to classes that will output these logs in some format,
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* one can also implement this interface over a filter and insert that in the chain,
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* such that no targets further down see certain data, or see manipulated forms of the data.
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* You could, for instance, write a "ToHtmlLoggerNode" that just converted all the log data
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* it received to HTML and sent it along to the next node in the chain, without printing it
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* anywhere.
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*/
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public interface LogNode {
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/**
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* Instructs first LogNode in the list to print the log data provided.
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* @param priority Log level of the data being logged. Verbose, Error, etc.
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* @param tag Tag for for the log data. Can be used to organize log statements.
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* @param msg The actual message to be logged. The actual message to be logged.
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* @param tr If an exception was thrown, this can be sent along for the logging facilities
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* to extract and print useful information.
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*/
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public void println(int priority, String tag, String msg, Throwable tr);
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}
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