org.jboss.logging.AbstractLoggerProvider Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
*
* Copyright 2010 Red Hat, Inc.
*
* 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 org.jboss.logging;
import java.util.ArrayDeque;
abstract class AbstractLoggerProvider {
private final ThreadLocal> ndcStack = new ThreadLocal>();
public void clearNdc() {
ArrayDeque stack = ndcStack.get();
if (stack != null)
stack.clear();
}
public String getNdc() {
ArrayDeque stack = ndcStack.get();
return stack == null || stack.isEmpty() ? null : stack.peek().merged;
}
public int getNdcDepth() {
ArrayDeque stack = ndcStack.get();
return stack == null ? 0 : stack.size();
}
public String peekNdc() {
ArrayDeque stack = ndcStack.get();
return stack == null || stack.isEmpty() ? "" : stack.peek().current;
}
public String popNdc() {
ArrayDeque stack = ndcStack.get();
return stack == null || stack.isEmpty() ? "" : stack.pop().current;
}
public void pushNdc(String message) {
ArrayDeque stack = ndcStack.get();
if (stack == null) {
stack = new ArrayDeque();
ndcStack.set(stack);
}
stack.push(stack.isEmpty() ? new Entry(message) : new Entry(stack.peek(), message));
}
public void setNdcMaxDepth(int maxDepth) {
final ArrayDeque stack = ndcStack.get();
if (stack != null) while (stack.size() > maxDepth) stack.pop();
}
private static class Entry {
private String merged;
private String current;
Entry(String current) {
merged = current;
this.current = current;
}
Entry(Entry parent, String current) {
merged = parent.merged + ' ' + current;
this.current = current;
}
}
}