Request parameters usually are only sent once, namely when there is a
corresponding parameter in the HTTP request. If there are other requests
following with no key parameter, then the variable gets null ;).
So if you want to have that "String key" during the whole conversation, there
are two possibilities:
- add (f:param name="key" value="#{yourBean.key}" /) to every commandLink,
commandButton, ... on your page, so that it gets always re-injected (BAD IDEA,
blows up your page code and it's silly to pass the same parameters from client
to server on and on ;))
- copy the key to another property during the conversation's
begin:@RequestParameter
| String key;
|
| String keyCopy; //choose a better name ;)
|
| @Begin
| public String beginActionMethod() {
| keyCopy = key;
| ...
| }
|
| public String someOtherActionMethod() {
| doSomethingWith(keyCopy); //key would be null here, so use keyCopy
| }
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