I am pretty new to seam framework but have 3 years experience with previous
versions of EJB. Our project is using seam to generate codes for a web
application to access backend database. It works pretty good. However, I have
the need to access the same database in standalone Java applications outside of
Jboss virtual machine. When I looked at the seam-generated code, I am lost and
need help.
First how to look up session bean in my Java application? I can not find the
ejb-jar.xml so I do not know what is the jndi name used for the generated
beans. Second, I do not know how to call those generated beans. For example, I
have a table called Host in a test database, the table is simple with id,
hostname, and connect_time. Use seam setup, seam new-project, seam
generate-entities, and seam explode, seam framework did almost everything for
me. It generates two java files in the action folder. Here is the code: in
HostList.java
@Name("hostList")
| public class HostList extends EntityQuery {
|
| private static final String[] RESTRICTIONS = {"lower(host.hostname)
like concat(lower(#{hostList.host.hostname}),'%')",};
|
| private Host host = new Host();
|
| @Override
| public String getEjbql() {
| return "select host from Host host";
| }
|
| @Override
| public Integer getMaxResults() {
| return 25;
| }
|
| public Host getHost() {
| return host;
| }
|
| @Override
| public List<String> getRestrictions() {
| return Arrays.asList(RESTRICTIONS);
| }
|
| }
in HostHome.java
@Name("hostHome")
| public class HostHome extends EntityHome<Host> {
|
| public void setHostId(Integer id) {
| setId(id);
| }
|
| public Integer getHostId() {
| return (Integer) getId();
| }
|
| @Override
| protected Host createInstance() {
| Host host = new Host();
| return host;
| }
|
| public void wire() {
| }
|
| public boolean isWired() {
| return true;
| }
|
| public Host getDefinedInstance() {
| return isIdDefined() ? getInstance() : null;
| }
|
| }
By looking at the code, I am lost at how I should call the bean to make select,
update, delete, and insert operations.
Would anyone give me some help or point me to some documents or tutorials?
Thanks a lot.
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