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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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 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() {
            @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);
    }

    @Override
    public String toString() {
        if (dateFormat == null)
            return DATE_TIME;
        return CUSTOM_TIME + dateFormat + "}";
    }

    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;
        }
    }
}