jsf 2.2 - JSF: Mojarra vs. OmniFaces @ViewScoped: @PreDestroy called but bean can't be garbage collected -

-

this question specific omnifaces @viewscoped bean (however of interest wider discussion memory leakage , resource disposal jsf @viewscoped). based on results of netbeans8.1 test web app available on github:

investigation of undesirable holding of references various forms of jsf @viewscoped beans navigation type

https://github.com/webelcomau/jsfviewscopednav

that test web app has comprehensive readme complete instructions, annotated test web pages comparing obsolete jsf2.0-style @managedbean @viewscoped, jsf2.2-style cdi-friendly @named @viewscoped, , omnifaces @named @viewscoped beans.

the results using jvisualvm diagnosis summarised in downloadable spreadsheet (see screenshot below), , indicate while omnifaces-2.5.1 @viewscoped bean invokes @predestroy methods under get-based navigation cases when leaving view (giving opportunity release resources), not seem permit garbage collection of actual bean (at least not current context parameter settings).

in web.xml application set use:

com.sun.faces.numberofviewsinsession 4  com.sun.faces.numberoflogicalviews 4

by default omnifaces-specific parameter commented out:

org.omnifaces.view_scope_manager_max_active_view_scopes

the javax.faces.state_saving_method defaults 'server'.

the main question is:

q1: correct these omnifaces @viewscoped beans can't design garbage collected "live" (meaning through provocation using profiler's garbage collectiong action, not waiting until session over) ?

q2: if so, how can (should) 1 best force release of them on navigating away pages (especially under navigations) ?

q3: if not (if results incorrect because of other setting) why aren't witnessing provoked garbage collection of them, , can ensure indeed automatically released ?

since test web app downloadable, documented , self-explanatory, won't give code here, comparitive results far, screenshots of test web app pages in action:

screenshots of comparitive results

screenshot of home page leading per-bean type test cases

screenshot of jsf2.0-style case

screenshot of jsf2.2-style case

screenshot of omnifaces case

sreenshot of post-navigation target page


Comments

Post a Comment

Popular posts from this blog

php - How to display all orders for a single product showing the most recent first? Woocommerce -

-
i have password protected page on frontend. on page, want display full list of purchases associated single woocommerce product id. option 1: i've looked through woocommerce docs , , found: wc_cli_order , list_( $args, $assoc_args ) function lists orders. presumably, orders can filtered product id [--=] filter orders based on order property. line item fields (numeric array, started index zero): line_items.0.product_id option 2: i found article , based on customer id. i've modified code based on guesses meta_key , meta_value. $customer_orders = get_posts( array( 'numberposts' => -1, 'meta_key' => '_product', 'meta_value' => get_product_id(), 'post_type' => wc_get_order_types(), 'post_status' => array_keys( wc_get_order_statuses() ), ) ); how display orders single product showing recent order first? here solution put based on these articles: http://www.w...
Read more

asp.net - How to correctly use QUERY_STRING in ISAPI rewrite? -

-
i'm having difficult time , hope guys can help. using helicon isapi rewrite version 3.1.0.104 on our iis server. edit http.conf file , have tried , still fail. this trying do: redirect url: https://www.domain.com/switch-by-version?version=2.8.5.2594 to: https://test.domain.com/load/load.aspx?tver=2.8.5.2594 the version number @ end source url change, , need target url have same version number @ end of url example above shows. i tried following not work: rewritecond %{query_string} ^version=(\d\d?)\.(\d\d?)\.(\d\d?)\.(.*)$ [nc] rewriterule ^/switch-by-version(.*)$ https://test.domain.com/load/load.aspx?tver=%1 [r=307,nc,l] any appreciated! thanks. if it's running in equivalent context of .htaccess , rule shouldn't start / . here's simpler version: rewritecond %{query_string} ^version=(\d+\.\d+\.\d+(?:\..+)?)$ [nc] rewriterule ^switch-by-version/?$ https://test.domain.com/load/load.aspx?tver=%1 [r=307,nc,l]
Read more

angularjs - How restrict admin panel using in backend laravel and admin panel on angular? -

-
https://scotch.io/tutorials/token-based-authentication-for-angularjs-and-laravel-apps following tutorials, try write authentication restrict admin panel, didn't understood how can that. this admin panel, admin panel don't want show , request database unauthenticated users. my laravel-routes route::get('/admin',function(){ return view('index'); }); route::get('/api/v1/employees/{id?}', 'employees@index'); route::get('/api/v1/users/{id?}', 'employees@users'); route::post('/api/v1/employees', 'employees@store'); route::post('/api/v1/employees/{id}', 'employees@update'); route::delete('/api/v1/employees/{id}', 'employees@destroy'); route::group(['prefix' => 'api'], function() { route::resource('authenticate', 'authenticatecontroller', ['only' => ['index']]); route::post('authenticate', 'authentic...
Read more