Spring MVC 3 Hibernate JPA Annotations onetomany and manytoone relationships cascade delete

I have the following entities and I have to delete the ServiceRegistration and ServiceChannels entries when I delete the ServiceRegistration record. But now, if I delete a record in serviceregistration, it delete the records in channel which is metadata table.

ServiceRegistration.Java

@OneToMany(cascade=CascadeType.ALL,fetch = FetchType.EAGER)
@JoinTable(name = "ServiceChannel", joinColumns = {
 @JoinColumn(name="serviceid", unique = true) 
 },
 inverseJoinColumns = {
 @JoinColumn(name="channelid")
 }
 )

 private List<Channels> channelsInvolved;

     public List<Channels> getChannelsInvolved() {
    return channelsInvolved;
  }

public void setChannelsInvolved(List<Channels> channelsInvolved) {
    this.channelsInvolved = channelsInvolved;
  }

ServiceChannels.java

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column private int servicechannelid;    

@ManyToOne
@JoinColumn(name = "serviceid")
private ServiceRegistration serviceRegistration;

@ManyToOne
@JoinColumn(name = "channelid")
private Channels channels;

Channels.java >> contains meta-data

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column private int channelid;
@Column private String channelname;

@Override
    public boolean equals(final Object obj) {
        if (obj instanceof Channels) {
 开发者_运维百科           final Channels other = (Channels) obj;
            if (other.getChannelid() == getChannelid()) {
                return true;
            }
        } 
        return false;
    }

Please help me how to do cascade delete in this entity relation.

---

First, if you don't want to get channels deleted when deleting a ServiceRegistration, you should do:

@OneToMany(fetch = FetchType.EAGER)
@JoinTable(name = "ServiceChannel", joinColumns = {
 @JoinColumn(name="serviceid", unique = true) 
 },
 inverseJoinColumns = {
 @JoinColumn(name="channelid")
 }
 )

 private List<Channels> channelsInvolved;

In your service registration (disable cascading).

Also, if you want to get your ServiceChannel removed when you delete a ServiceRegistration, you have to configure the relationship in the ServiceRegistration side:

@OneToMany(mappedBy="serviceRegistration", cascade=CascadeType.REMOVE) // Edited to specify the owning side of the relationship
private List<ServiceChannel> serviceChannels;