forked from dekorateio/dekorate
/
LoggerFactory.java
67 lines (58 loc) · 1.98 KB
/
LoggerFactory.java
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/**
* Copyright 2018 The original 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.dekorate;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ServiceLoader;
import java.util.stream.StreamSupport;
import io.dekorate.logger.AnsiLogger;
public abstract class LoggerFactory<C> {
private static Logger LOGGER;
public Class<C> getType() {
ParameterizedType type = (ParameterizedType) getClass().getGenericSuperclass();
Type[] types = type.getActualTypeArguments();
return (Class<C>) types[0];
}
protected abstract Logger create(C context);
public static Logger getLogger() {
if (LOGGER != null) {
return LOGGER;
}
synchronized (LoggerFactory.class) {
if (LOGGER == null) {
LOGGER = new AnsiLogger();
}
}
return LOGGER;
}
public static <C> Logger getLogger(C context) {
if (LOGGER != null) {
return LOGGER;
}
synchronized (LoggerFactory.class) {
if (LOGGER == null) {
ServiceLoader<LoggerFactory> loader = ServiceLoader.load(LoggerFactory.class, LoggerFactory.class.getClassLoader());
LOGGER = StreamSupport.stream(loader.spliterator(), false)
.filter(l->l.getType().isAssignableFrom(context.getClass()))
.findFirst()
.orElseThrow(()->new IllegalStateException("Could not find LoggerFactory that supports: "+ context.getClass()+"."))
.create(context);
}
}
return LOGGER;
}
}