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Apache CXF example source code file (AtomPushEngineConfigurator.java)

This example Apache CXF source code file (AtomPushEngineConfigurator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

atompushengine, atompushengine, class, constructor, converter, deliverer, exception, exception, illegalargumentexception, reflection, standardconverter, string, string, t, t

The Apache CXF AtomPushEngineConfigurator.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.cxf.management.web.logging.atom;

import java.lang.reflect.Constructor;

import org.apache.cxf.management.web.logging.atom.converter.Converter;
import org.apache.cxf.management.web.logging.atom.converter.StandardConverter;
import org.apache.cxf.management.web.logging.atom.converter.StandardConverter.Format;
import org.apache.cxf.management.web.logging.atom.converter.StandardConverter.Multiplicity;
import org.apache.cxf.management.web.logging.atom.converter.StandardConverter.Output;
import org.apache.cxf.management.web.logging.atom.deliverer.Deliverer;
import org.apache.cxf.management.web.logging.atom.deliverer.RetryingDeliverer;
import org.apache.cxf.management.web.logging.atom.deliverer.WebClientDeliverer;

/**
 * Package private interpreter of incomplete input of engine configuration. Used commonly by
 * {@link AtomPushHandler properties file} and {@link AtomPushBean spring} configuration schemes.
 */
// TODO extract 'general rules' of interpretation in handler and bean and put here
final class AtomPushEngineConfigurator {

    private Deliverer deliverer;
    private Converter converter;
    private String delivererClass;
    private String converterClass;
    private String batchSize;
    private String batchCleanupTime;
    private String delivererUrl;
    private String retryTimeout;
    private String retryPause;
    private String retryPauseTime;
    private String output;
    private String multiplicity;
    private String format;

    public void setUrl(String url) {
        this.delivererUrl = url;
    }

    public void setRetryTimeout(String retryTimeout) {
        this.retryTimeout = retryTimeout;
    }

    public void setRetryPause(String retryPause) {
        this.retryPause = retryPause;
    }

    public void setRetryPauseTime(String retryPauseTime) {
        this.retryPauseTime = retryPauseTime;
    }

    public void setBatchCleanupTime(String cleanupTime) {
        this.batchCleanupTime = cleanupTime;
    }
    
    public void setBatchSize(String batchSize) {
        this.batchSize = batchSize;
    }

    public void setDeliverer(Deliverer deliverer) {
        this.deliverer = deliverer;
    }

    public void setConverter(Converter converter) {
        this.converter = converter;
    }

    public void setDelivererClass(String delivererClass) {
        this.delivererClass = delivererClass;
    }

    public void setConverterClass(String converterClass) {
        this.converterClass = converterClass;
    }

    public void setOutput(String output) {
        this.output = output;
    }

    public void setMultiplicity(String multiplicity) {
        this.multiplicity = multiplicity;
    }

    public void setFormat(String format) {
        this.format = format;
    }

    public AtomPushEngine createEngine() {
        Deliverer d = deliverer;
        Converter c = converter;
        int batch = parseInt(batchSize, 1, 1);
        int batchTime = parseInt(batchCleanupTime, 0);
        if (d == null) {
            if (delivererUrl != null) {
                if (delivererClass != null) {
                    d = createDeliverer(delivererClass, delivererUrl);
                } else {
                    d = new WebClientDeliverer(delivererUrl);
                }
            } else {
                throw new IllegalStateException("Either url, deliverer or "
                                                + "deliverer class with url must be setup");
            }
        }
        if (c == null) {
            if (converterClass != null) {
                c = createConverter(converterClass);
            } else {
                Output out = parseEnum(output, Output.FEED, Output.class);
                Multiplicity defaultMul = out == Output.FEED ? Multiplicity.MANY
                    : batch > 1 ? Multiplicity.MANY : Multiplicity.ONE; 
                Multiplicity mul = parseEnum(multiplicity, defaultMul, Multiplicity.class);
                Format form = parseEnum(format, Format.CONTENT, Format.class);
                if (out == Output.FEED) {
                    c = new StandardConverter(out, mul, form);
                } else {
                    c = new StandardConverter(out, mul, form);
                }
                if (retryPause != null) {
                    int timeout = parseInt(retryTimeout, 0, 0);
                    int pause = parseInt(retryPauseTime, 1, 30);
                    boolean linear = !retryPause.equalsIgnoreCase("exponential");
                    d = new RetryingDeliverer(d, timeout, pause, linear);
                }
            }
        }
        AtomPushEngine engine = new AtomPushEngine();
        engine.setDeliverer(d);
        engine.setConverter(c);
        engine.setBatchSize(batch);
        engine.setBatchTime(batchTime);
        return engine;
    }

    private Deliverer createDeliverer(String clazz, String url) {
        try {
            Constructor<Deliverer> ctor = loadClass(clazz, Deliverer.class).getConstructor(String.class);
            return ctor.newInstance(url);
        } catch (Exception e) {
            throw new IllegalArgumentException(e);
        }
    }

    private Converter createConverter(String clazz) {
        try {
            Constructor<Converter> ctor = loadClass(clazz, Converter.class).getConstructor();
            return ctor.newInstance();
        } catch (Exception e) {
            throw new IllegalArgumentException(e);
        }
    }

    @SuppressWarnings("unchecked")
    private <T> Class loadClass(String clazz, Class ifaceClass) throws ClassNotFoundException {
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        try {
            return (Class<T>)cl.loadClass(clazz);
        } catch (ClassNotFoundException e) {
            try {
                // clazz could be shorted (stripped package name) retry for interface location
                String pkg = ifaceClass.getPackage().getName();
                String clazz2 = pkg + "." + clazz;
                return (Class<T>)cl.loadClass(clazz2);
            } catch (Exception e1) {
                throw new ClassNotFoundException(e.getMessage() + " or " + e1.getMessage());
            }
        }
    }

    private int parseInt(String property, int defaultValue) {
        try {
            return Integer.parseInt(property);
        } catch (NumberFormatException e) {
            return defaultValue;
        }
    }

    private int parseInt(String property, int lessThan, int defaultValue) {
        int ret = parseInt(property, defaultValue);
        if (ret < lessThan) {
            ret = defaultValue;
        }
        return ret;
    }

    private <T extends Enum T parseEnum(String value, T defaultValue, Class enumClass) {
        if (value == null | "".equals(value)) {
            return defaultValue;
        }
        try {
            return Enum.valueOf(enumClass, value.toUpperCase());
        } catch (Exception e) {
            return defaultValue;
        }
    }
}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF AtomPushEngineConfigurator.java source code file:

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