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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 *
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package org.glassfish.loadbalancer.admin.cli.reader.impl;

import org.glassfish.loadbalancer.admin.cli.transform.Visitor;
import org.glassfish.loadbalancer.admin.cli.transform.HealthCheckerVisitor;
import org.glassfish.loadbalancer.admin.cli.reader.api.HealthCheckerReader;
import org.glassfish.loadbalancer.admin.cli.reader.api.LbReaderException;
import com.sun.enterprise.config.serverbeans.HealthChecker;
import org.glassfish.loadbalancer.admin.cli.LbLogUtil;

/**
 * Provides health checker information relavant to Load balancer tier.
 *
 * @author Kshitiz Saxena
 */
public class HealthCheckerReaderImpl implements HealthCheckerReader {

    static HealthCheckerReader getDefaultHealthChecker() {
        return defaultHCR;
    }

    public HealthCheckerReaderImpl() {
        _hc = null;
    }

    /**
     * Constructor 
     */
    public HealthCheckerReaderImpl(HealthChecker hc) {
        if (hc == null) {
            String msg = LbLogUtil.getStringManager().getString("ConfigBeanAndNameNull");
            throw new IllegalArgumentException(msg);
        }
        _hc = hc;
    }

    /**
     * Return health checker url
     *
     * @return String           health checker url, it shoudld conform to
     *                          RFC 2396. java.net.URI.resolve(url) shoudl
     *                          return a valid URI.
     */
    @Override
    public String getUrl() throws LbReaderException {
        if (_hc == null) {
            return defaultURL;
        }
        return _hc.getUrl();
    }

    /**
     * Health checker runs in the specified interval time.
     *
     * @return String           value must be > 0
     */
    @Override
    public String getIntervalInSeconds() throws LbReaderException {
        if (_hc == null) {
            return defaultInterval;
        }
        return _hc.getIntervalInSeconds();
    }

    /**
     *  Timeout where a server is considered un healthy.
     *
     * @return String           value must be > 0
     */
    @Override
    public String getTimeoutInSeconds() throws LbReaderException {
        if (_hc == null) {
            return defaultTimeout;
        }
        return _hc.getTimeoutInSeconds();
    }

    // --- VISITOR IMPLEMENTATION ---
    @Override
    public void accept(Visitor v) throws Exception {
		if (v instanceof HealthCheckerVisitor) {
			HealthCheckerVisitor pv = (HealthCheckerVisitor) v;
			pv.visit(this);
		}
    }
    //--- PRIVATE VARIABLES ------
    HealthChecker _hc = null;
    private static final HealthCheckerReader defaultHCR =
            new HealthCheckerReaderImpl();
    private static final String defaultURL = "/";
    private static final String defaultInterval = "10";
    private static final String defaultTimeout = "30";
}