工作中遇到的问题--实现CustomerSetting的实时更新

首先在项目运行时就初始化CustomerSettings的值，采用@Bean，默认是singtone模式，只会加载一次。

@Configuration
@Order(3)
@EnableWebMvcSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class MFGWebSecurityConfigurerAdapter extends
        AWebSecurityConfigurerAdapter {

@Autowired
    private UserRepository userRepository;

@Autowired
    private CustomerSettingsRepository customerSettingsRepository;

@Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                .formLogin()
                .successHandler(
                        new SavedRequestAwareAuthenticationSuccessHandler())
                .loginPage("/login").permitAll().failureUrl("/login-error")
                .defaultSuccessUrl("/").and().logout()
                .logoutRequestMatcher(new AntPathRequestMatcher("/logout"))
                .logoutSuccessUrl("/logged-out").permitAll().and().rememberMe()
                .key(SECURITY_TOKEN)
                .tokenRepository(persistentTokenRepository())
                .tokenValiditySeconds(mfgSettings.getRememberMeTokenValidity())
                .and().sessionManagement().maximumSessions(1)
                .sessionRegistry(sessionRegistry).and().sessionFixation()
                .migrateSession().and().authorizeRequests().anyRequest()
                .authenticated();
    }

@Bean
    public PersistentTokenRepository persistentTokenRepository() {
        JdbcTokenRepositoryImpl tokenRepository = new JdbcTokenRepositoryImpl();
        tokenRepository.setDataSource(dataSource);
        return tokenRepository;
    }

@Bean
    @LoggedInUser
    @Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
    @Transactional(readOnly = true)
    public User getLoggedInUser() {
        Authentication authentication = SecurityContextHolder.getContext()
                .getAuthentication();
        if (authentication != null
                && !(authentication instanceof AnonymousAuthenticationToken)
                && authentication.isAuthenticated())
            return userRepository.findByLogin(authentication.getName());
        return null;
    }

@Bean
    @SystemUser
    @Scope(value = WebApplicationContext.SCOPE_APPLICATION, proxyMode = ScopedProxyMode.NO)
    @Transactional(readOnly = true)
    public User getSystemUser() {
        return userRepository.findByLogin(Constants.SYSTEM_USER);
    }

@Bean
    public CustomerSettings customerSettings() {
        return customerSettingsRepository.findAll().get(0);
    }
}
为了能够在CustomerSettings发生改变时，对相关的值进行实时更新，在CustomerService中添加更新后的操作方法：

@Override
    protected void afterUpdate(CustomerSettings t) {
        customerSettings.editFrom(t);
    }

@Override
    protected void afterEdit(CustomerSettings t) {
        customerSettings.editFrom(t);
    }

另外：enitForm方法是写在CustomerSettings.java这个实体类中的，这样在更新时就能实现对其中元素的部分更新，避免以前实训中有些元素没更新就会被置空，需要每次都先查询再手动部分更新的情况。

以下是这个实体中使用enitForm的案例：

package com.sim.mfg.data.domain;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.EntityListeners;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.MappedSuperclass;
import javax.persistence.Transient;
import javax.persistence.Version;

import org.springframework.data.annotation.CreatedBy;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedBy;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.sim.mfg.data.dto.Action;

/**
 * AMfgObject, based of all MFG data classes
 * @author system-in-motion
 *
 */
@MappedSuperclass
@EntityListeners({AuditingEntityListener.class})
public abstract class AMfgObject {
    
    @Version
    @Column(name = "VERSION")
    private int version;

@CreatedDate
    @Column(name = "CREATION_DATE", nullable = false)
    private Date creationDate;
    
    @LastModifiedDate
    @Column(name = "UPDATE_DATE")
    private Date updateDate;
    
    @JsonIgnore
    @CreatedBy
    @JoinColumn(name = "CREATED_BY", nullable = false)
    @ManyToOne(fetch = FetchType.LAZY)
    private User createdBy;
    
    @JsonIgnore
    @LastModifiedBy
    @JoinColumn(name = "UPDATED_BY")
    @ManyToOne(optional = true, fetch = FetchType.LAZY)
    private User updatedBy;
    
    @Column(name = "ENABLED", columnDefinition = "INT", nullable = false)
    private boolean enabled = true;
    
    @Transient
    private Set<Action> actions;

/**
     * Empty constructor
     */
    public AMfgObject() {}    
    /**
     * Override this method to provide object edition from another object
     * @param <T>
     * @param dto
     * @return
     */
    public abstract void editFrom(AMfgObject object);
    
    public int getVersion() {
        return version;
    }
    public void setVersion(int version) {
        this.version = version;
    }
    public Date getCreationDate() {
        return creationDate;
    }

public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

public Date getUpdateDate() {
        return updateDate;
    }

public void setUpdateDate(Date updateDate) {
        this.updateDate = updateDate;
    }

public User getCreatedBy() {
        return createdBy;
    }

public void setCreatedBy(User createdBy) {
        this.createdBy = createdBy;
    }

public User getUpdatedBy() {
        return updatedBy;
    }

public void setUpdatedBy(User updatedBy) {
        this.updatedBy = updatedBy;
    }

public boolean isEnabled() {
        return enabled;
    }

public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }
    
    @JsonProperty
    public Set<Action> getActions() {
        return actions;
    }

public void setActions(Set<Action> actions) {
        this.actions = actions;
    }
    
    /**
     * Return a list of arrays of action data to be displayed by DataTables
     * @return
     */
    public List<String[]> getActionArrays() {
        List<String[]> actionArrays = new ArrayList<String[]>();
        if (actions != null) {
            for (Action action : actions) {
                actionArrays.add(new String[] {
                        action.getBase(),
                        action.getAction(),
                        action.getStyle(),
                        action.getIcon(),
                        action.getAltText(),
                        action.getObjectId() == null ? "" : String.valueOf(action.getObjectId())});
            }
        }
        // Sort by base + action to make sure the order is the same on each row
        Collections.sort(actionArrays, new Comparator<String[]>() {
            private static final int BASE = 0;
            private static final int ACTION = 1;
            @Override
            public int compare(String[] arg0, String[] arg1) {
                return (arg0[BASE]+arg0[ACTION]).compareTo(arg1[BASE]+arg1[ACTION]);
            }
            
        });
        return actionArrays;
    }
    
}

package com.sim.mfg.data.domain;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.Where;
import org.hibernate.validator.constraints.NotBlank;

import com.sim.mfg.data.domain.type.DistributionOperationType;

@Entity
@Table(name = "CUSTOMERSETTINGS")
@Where(clause = "enabled=1")
public class CustomerSettings extends AMfgObject implements Serializable{

/**
     *
     */
    private static final long serialVersionUID = 559748589762162346L;
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    
    @NotBlank
    @Column(name = "NAME", nullable = false)
    private String name;

@Column(name = "PREFIXLOWER", nullable = false)
    private String prefixLower;

@Column(name = "PREFIXUPPER", nullable = false)
    private String prefixUpper;
    
    @Column(name = "CODEURL", nullable = false)
    private String codeUrl;

@Column(name = "BATCHEXPIRYTIMEOUT", nullable = false)
    private long batchExpiryTimeout;
    
    @Column(name = "PRODUCTIONDATEENABLED", nullable = false)
    private boolean productionDateEnabled = true;

@Column(name = "EXPIRYDATEENABLED", nullable = false)
    private boolean expiryDateEnabled = true;

@Column(name = "FILLLOCATIONWIDGETENABLED", nullable = false)
    private boolean fillLocationWidgetEnabled = true;

@Column(name = "PRODUCTSHELFLIFEENABLED", nullable = false)
    private boolean productShelfLifeEnabled = true;

@Column(name = "PRODUCTBARCODEENABLED", nullable = false)
    private boolean productBarcodeEnabled = true;

@Column(name = "WEIXINTOKEN", nullable = false)
    private String weixinToken;

@Column(name = "WEIXINCORPID", nullable = false)
    private String weixinCorpId;

@Column(name = "WEIXINENCODINGAESKEY", nullable = false)
    private String weixinEncodingAesKey;

@Column(name = "WEIXINCORPSECRET", nullable = false)
    private String weixinCorpSecret;

@Column(name = "WEIXINCODEAPPLICATIONAPPID", nullable = false)
    private Integer weixinCodeApplicationAppId;

@Column(name = "WEIXINSHIPMENTOPERATIONAPPID", nullable = false)
    private Integer weixinShipmentOperationAppId;

@Column(name = "WEIXINDELIVERYOPERATIONAPPID", nullable = false)
    private Integer weixinDeliveryOperationAppId;

@Column(name = "WEIXINRECEPTIONOPERATIONAPPID", nullable = false)
    private Integer weixinReceptionOperationAppId;

@Column(name = "WEIXINSIMPLERECEPTIONOPERATIONAPPID", nullable = false)
    private Integer weixinSimpleReceptionOperationAppId;

@Column(name = "WEIXINRETURNOPERATIONAPPID", nullable = false)
    private Integer weixinReturnOperationAppId;

@Column(name = "WEIXININVENTORYOPERATIONAPPID", nullable = false)
    private Integer weixinInventoryOperationAppId;

@Column(name = "WEIXINMOVEMENTOPERATIONAPPID", nullable = false)
    private Integer weixinMovementOperationAppId;

@Column(name = "WEIXINFILLINGOPERATIONAPPID", nullable = false)
    private Integer weixinFillingOperationAppId;
    /**
     * Empty constructor
     */
    public CustomerSettings() {    }
    
    /**
     * Get Weixin app id for given distribution operation type
     * @param operationType
     * @return
     */
    public Integer getWeixinDistributionOperationAppId(DistributionOperationType operationType) {
        switch (operationType) {
        case SHIPMENT:
            return weixinShipmentOperationAppId;
        case DELIVERY:
            return weixinDeliveryOperationAppId;
        case RECEPTION:
            return weixinReceptionOperationAppId;
        case RETURN:
            return weixinReturnOperationAppId;
        case INVENTORY:
            return weixinInventoryOperationAppId;
        case SIMPLERECEPTION:
            return weixinSimpleReceptionOperationAppId;
        default:
            return null;
        }
    }

public Long getId() {
        return id;
    }

public void setId(Long id) {
        this.id = id;
    }

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

public String getPrefixLower() {
        return prefixLower;
    }

public void setPrefixLower(String prefixLower) {
        this.prefixLower = prefixLower;
    }

public String getPrefixUpper() {
        return prefixUpper;
    }

public void setPrefixUpper(String prefixUpper) {
        this.prefixUpper = prefixUpper;
    }

public String getCodeUrl() {
        return codeUrl;
    }

public void setCodeUrl(String codeUrl) {
        this.codeUrl = codeUrl;
    }

public long getBatchExpiryTimeout() {
        return batchExpiryTimeout;
    }

public void setBatchExpiryTimeout(long batchExpiryTimeout) {
        this.batchExpiryTimeout = batchExpiryTimeout;
    }

public boolean isProductionDateEnabled() {
        return productionDateEnabled;
    }

public void setProductionDateEnabled(boolean productionDateEnabled) {
        this.productionDateEnabled = productionDateEnabled;
    }

public boolean isExpiryDateEnabled() {
        return expiryDateEnabled;
    }

public void setExpiryDateEnabled(boolean expiryDateEnabled) {
        this.expiryDateEnabled = expiryDateEnabled;
    }

public boolean isFillLocationWidgetEnabled() {
        return fillLocationWidgetEnabled;
    }

public void setFillLocationWidgetEnabled(boolean fillLocationWidgetEnabled) {
        this.fillLocationWidgetEnabled = fillLocationWidgetEnabled;
    }

public boolean isProductShelfLifeEnabled() {
        return productShelfLifeEnabled;
    }

public void setProductShelfLifeEnabled(boolean productShelfLifeEnabled) {
        this.productShelfLifeEnabled = productShelfLifeEnabled;
    }

public boolean isProductBarcodeEnabled() {
        return productBarcodeEnabled;
    }

public void setProductBarcodeEnabled(boolean productBarcodeEnabled) {
        this.productBarcodeEnabled = productBarcodeEnabled;
    }

public String getWeixinToken() {
        return weixinToken;
    }

public void setWeixinToken(String weixinToken) {
        this.weixinToken = weixinToken;
    }

public String getWeixinCorpId() {
        return weixinCorpId;
    }

public void setWeixinCorpId(String weixinCorpId) {
        this.weixinCorpId = weixinCorpId;
    }

public String getWeixinEncodingAesKey() {
        return weixinEncodingAesKey;
    }

public void setWeixinEncodingAesKey(String weixinEncodingAesKey) {
        this.weixinEncodingAesKey = weixinEncodingAesKey;
    }

public String getWeixinCorpSecret() {
        return weixinCorpSecret;
    }

public void setWeixinCorpSecret(String weixinCorpSecret) {
        this.weixinCorpSecret = weixinCorpSecret;
    }

public Integer getWeixinCodeApplicationAppId() {
        return weixinCodeApplicationAppId;
    }

public void setWeixinCodeApplicationAppId(Integer weixinCodeApplicationAppId) {
        this.weixinCodeApplicationAppId = weixinCodeApplicationAppId;
    }

public Integer getWeixinShipmentOperationAppId() {
        return weixinShipmentOperationAppId;
    }

public void setWeixinShipmentOperationAppId(Integer weixinShipmentOperationAppId) {
        this.weixinShipmentOperationAppId = weixinShipmentOperationAppId;
    }

public Integer getWeixinDeliveryOperationAppId() {
        return weixinDeliveryOperationAppId;
    }

public void setWeixinDeliveryOperationAppId(Integer weixinDeliveryOperationAppId) {
        this.weixinDeliveryOperationAppId = weixinDeliveryOperationAppId;
    }

public Integer getWeixinReceptionOperationAppId() {
        return weixinReceptionOperationAppId;
    }

public void setWeixinReceptionOperationAppId(
            Integer weixinReceptionOperationAppId) {
        this.weixinReceptionOperationAppId = weixinReceptionOperationAppId;
    }

public Integer getWeixinSimpleReceptionOperationAppId() {
        return weixinSimpleReceptionOperationAppId;
    }

public void setWeixinSimpleReceptionOperationAppId(
            Integer weixinSimpleReceptionOperationAppId) {
        this.weixinSimpleReceptionOperationAppId = weixinSimpleReceptionOperationAppId;
    }

public Integer getWeixinReturnOperationAppId() {
        return weixinReturnOperationAppId;
    }

public void setWeixinReturnOperationAppId(Integer weixinReturnOperationAppId) {
        this.weixinReturnOperationAppId = weixinReturnOperationAppId;
    }

public Integer getWeixinInventoryOperationAppId() {
        return weixinInventoryOperationAppId;
    }

public void setWeixinInventoryOperationAppId(
            Integer weixinInventoryOperationAppId) {
        this.weixinInventoryOperationAppId = weixinInventoryOperationAppId;
    }

public Integer getWeixinMovementOperationAppId() {
        return weixinMovementOperationAppId;
    }

public void setWeixinMovementOperationAppId(Integer weixinMovementOperationAppId) {
        this.weixinMovementOperationAppId = weixinMovementOperationAppId;
    }

public Integer getWeixinFillingOperationAppId() {
        return weixinFillingOperationAppId;
    }

public void setWeixinFillingOperationAppId(Integer weixinFillingOperationAppId) {
        this.weixinFillingOperationAppId = weixinFillingOperationAppId;
    }

@Override
    public void editFrom(AMfgObject object) {
        if(object==null)
            return ;
        CustomerSettings custSettings=(CustomerSettings)object;
        this.name=custSettings.getName();
        this.codeUrl=custSettings.getCodeUrl();
        this.batchExpiryTimeout=custSettings.getBatchExpiryTimeout();
        this.expiryDateEnabled=custSettings.isExpiryDateEnabled();
        this.fillLocationWidgetEnabled=custSettings.isFillLocationWidgetEnabled();
        this.prefixLower=custSettings.getPrefixLower();
        this.prefixUpper=custSettings.getPrefixUpper();
        this.productBarcodeEnabled=custSettings.isProductBarcodeEnabled();
        this.productionDateEnabled=custSettings.isProductionDateEnabled();
        this.productShelfLifeEnabled=custSettings.isProductShelfLifeEnabled();
        this.weixinCodeApplicationAppId=custSettings.getWeixinCodeApplicationAppId();
        this.weixinCorpId=custSettings.getWeixinCorpId();
        this.weixinCorpSecret=custSettings.getWeixinCorpSecret();
        this.weixinDeliveryOperationAppId=custSettings.getWeixinDeliveryOperationAppId();
        this.weixinEncodingAesKey=custSettings.getWeixinEncodingAesKey();
        this.weixinFillingOperationAppId=custSettings.getWeixinFillingOperationAppId();
        this.weixinInventoryOperationAppId=custSettings.getWeixinInventoryOperationAppId();
        this.weixinMovementOperationAppId=custSettings.getWeixinMovementOperationAppId();
        this.weixinReceptionOperationAppId=custSettings.getWeixinReceptionOperationAppId();
        this.weixinReturnOperationAppId=custSettings.getWeixinReturnOperationAppId();
        this.weixinShipmentOperationAppId=custSettings.getWeixinShipmentOperationAppId();
        this.weixinSimpleReceptionOperationAppId=custSettings.getWeixinSimpleReceptionOperationAppId();
        this.weixinToken=custSettings.getWeixinToken();
    }

@Override
    public String toString() {
        return "CustSettings [id=" + id + ", name=" + name + ", codeUrl="
                + codeUrl + "]";
    }
    
}