com.htmlhifive.sync.resource.DefaultSynchronizer.java Source code

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Here is the source code for com.htmlhifive.sync.resource.DefaultSynchronizer.java

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/*
 * Copyright (C) 2012-2013 NS Solutions Corporation
 *
 * 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 com.htmlhifive.sync.resource;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceException;

import org.hibernate.exception.ConstraintViolationException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.jpa.repository.JpaRepository;

import com.htmlhifive.sync.config.SyncConfigurationParameter;
import com.htmlhifive.sync.resource.common.ResourceItemCommonData;
import com.htmlhifive.sync.resource.common.ResourceItemCommonDataId;
import com.htmlhifive.sync.resource.common.ResourceItemCommonDataRepository;
import com.htmlhifive.sync.resource.common.SyncAction;
import com.htmlhifive.sync.resource.update.UpdateStrategy;
import com.htmlhifive.sync.service.SyncRequestCommonData;

/**
 * @author kishigam
 */
public class DefaultSynchronizer implements Synchronizer {

    /**
     * sync?
     */
    private SyncConfigurationParameter syncConfigurationParameter;

    /**
     * JPA EntityManager.<br>
     * getNew????????{@link JpaRepository JpaRepository}??????.
     */
    @PersistenceContext
    private EntityManager entityManager;

    /**
     * ?????
     */
    @Autowired
    private ResourceItemCommonDataRepository resourceItemCommonDataRepository;

    /**
     * ???.
     */
    private UpdateStrategy defaultUpdateStrategy;

    /**
     * ??ID??????????.<br/>
     * ???????{@link DefaultSynchronizer#modify(ResourceItemCommonData)} ?????????.
     *
     * @param itemCommonId ?ID
     * @return ???
     */
    @Override
    public ResourceItemCommonData getNew(ResourceItemCommonDataId itemCommonId) {

        ResourceItemCommonData common = new ResourceItemCommonData(itemCommonId);

        try {
            entityManager.persist(common);
            entityManager.flush();
        } catch (PersistenceException e) {
            // ???(????)
            if (!(e.getCause() instanceof ConstraintViolationException)) {
                throw e;
            }
            common.setSyncAction(SyncAction.DUPLICATE);
        }
        return common;
    }

    /**
     * ??ID??("for update")??????.
     *
     * @param itemCommonId ?ID
     * @return 
     */
    @Override
    public ResourceItemCommonData getForUpdate(ResourceItemCommonDataId itemCommonId) {

        return resourceItemCommonDataRepository.findOneForUpdate(itemCommonId);
    }

    /**
     * ???ID????????????.
     *
     * @param resourceName ??
     * @param targetItemIdList ?ID?
     * @param modifiedSince ??
     * @return ???
     */
    @Override
    public List<ResourceItemCommonData> getModified(String resourceName, List<String> targetItemIdList,
            long modifiedSince) {

        List<ResourceItemCommonData> commonList = new ArrayList<>();

        // ID???
        List<String> tempList = new ArrayList<>(targetItemIdList);
        Collections.sort(tempList);

        for (String id : tempList) {

            ResourceItemCommonData common = resourceItemCommonDataRepository.findModified(resourceName, id,
                    modifiedSince);

            if (common != null) {
                commonList.add(common);
            }
        }

        return commonList;
    }

    /**
     * ???ID????????("for update")??????.<br/>
     * ID???????????ID?????????.
     *
     * @param resourceName ??
     * @param targetItemIdList ?ID?
     * @param modifiedSince ??
     * @return ???
     */
    @Override
    public List<ResourceItemCommonData> getModifiedForUpdate(String resourceName, List<String> targetItemIdList,
            long modifiedSince) {
        List<ResourceItemCommonData> commonList = new ArrayList<>();

        // ID???
        List<String> tempList = new ArrayList<>(targetItemIdList);
        Collections.sort(tempList);

        for (String id : tempList) {

            ResourceItemCommonData common = resourceItemCommonDataRepository.findModifiedForUpdate(resourceName, id,
                    modifiedSince);

            if (common != null) {
                commonList.add(common);
            }
        }

        return commonList;
    }

    /**
     * ?????????????true???.
     *
     * @param clientItemCommon update(/delete)?
     * @param currentItemCommon ?????????
     * @return ??????true.
     */
    @Override
    public boolean isConflicted(ResourceItemCommonData clientItemCommon, ResourceItemCommonData currentItemCommon,
            SyncRequestCommonData requestCommon) {

        if (currentItemCommon.getLastModified() <= clientItemCommon.getLastModified()) {
            return false;
        }

        // ?????????????
        // sync??????????????
        return currentItemCommon.getLastModified() != requestCommon.getSyncTime();
    }

    /**
     * ???????.
     *
     * @param itemCommon 
     * @return ?
     */
    @Override
    public ResourceItemCommonData modify(ResourceItemCommonData itemCommon) {

        ResourceItemCommonData saved = resourceItemCommonDataRepository.save(itemCommon);
        return saved;
    }

    @Override
    public SyncConfigurationParameter getSyncConfigurationParameter() {
        return syncConfigurationParameter;
    }

    @Override
    public void setSyncConfigurationParameter(SyncConfigurationParameter syncConfigurationParameter) {
        this.syncConfigurationParameter = syncConfigurationParameter;
    }

    @Override
    public UpdateStrategy getDefaultUpdateStrategy() {
        return defaultUpdateStrategy;
    }

    @Override
    public void setDefaultUpdateStrategy(UpdateStrategy defaultUpdateStrategy) {
        this.defaultUpdateStrategy = defaultUpdateStrategy;
    }
}