/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.undertow.attribute;
import java.text.
SimpleDateFormat;
import java.util.
Date;
import java.util.
TimeZone;
import io.undertow.server.
HttpServerExchange;
import io.undertow.util.
DateUtils;
/**
* The current time
*
* @author Stuart Douglas
*/
public class
DateTimeAttribute implements
ExchangeAttribute {
public static final
String DATE_TIME_SHORT = "%t";
public static final
String DATE_TIME = "%{DATE_TIME}";
public static final
String CUSTOM_TIME = "%{time,";
public static final
ExchangeAttribute INSTANCE = new
DateTimeAttribute();
private final
String dateFormat;
private final
ThreadLocal<
SimpleDateFormat>
cachedFormat;
private
DateTimeAttribute() {
this.
dateFormat = null;
this.
cachedFormat = null;
}
public
DateTimeAttribute(final
String dateFormat) {
this(
dateFormat, null);
}
public
DateTimeAttribute(final
String dateFormat, final
String timezone) {
this.
dateFormat =
dateFormat;
this.
cachedFormat = new
ThreadLocal<
SimpleDateFormat>() {
@
Override
protected
SimpleDateFormat initialValue() {
final
SimpleDateFormat format = new
SimpleDateFormat(
dateFormat);
if(
timezone != null) {
format.
setTimeZone(
TimeZone.
getTimeZone(
timezone));
}
return
format;
}
};
}
@
Override
public
String readAttribute(final
HttpServerExchange exchange) {
if(
dateFormat == null) {
return
DateUtils.
toCommonLogFormat(new
Date());
} else {
final
SimpleDateFormat dateFormat = this.
cachedFormat.
get();
return
dateFormat.
format(new
Date());
}
}
@
Override
public void
writeAttribute(final
HttpServerExchange exchange, final
String newValue) throws
ReadOnlyAttributeException {
throw new
ReadOnlyAttributeException("Date time",
newValue);
}
public static final class
Builder implements
ExchangeAttributeBuilder {
@
Override
public
String name() {
return "Date Time";
}
@
Override
public
ExchangeAttribute build(final
String token) {
if (
token.
equals(
DATE_TIME) ||
token.
equals(
DATE_TIME_SHORT)) {
return
DateTimeAttribute.
INSTANCE;
}
if(
token.
startsWith(
CUSTOM_TIME) &&
token.
endsWith("}")) {
return new
DateTimeAttribute(
token.
substring(
CUSTOM_TIME.
length(),
token.
length() - 1));
}
return null;
}
@
Override
public int
priority() {
return 0;
}
}
}