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* New backend startup and upgrade support, see [doc/startup.md] for details

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* Datastore files contain RFC7895 module-state information
This commit is contained in:
Olof hagsand 2019-02-13 11:35:49 +01:00
parent 28bd698968
commit 560110b4e8
44 changed files with 1595 additions and 631 deletions
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46
example/example_backend.c
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@ -39,6 +39,7 @@
#include <signal.h>
#include <unistd.h>
#include <assert.h>
#include <syslog.h>
#include <sys/time.h>
/* clicon */
@ -50,6 +51,13 @@
/* These include signatures for plugin and transaction callbacks. */
#include <clixon/clixon_backend.h>
/* Variable to control if reset code is run.
* The reset code inserts "extra XML" which assumes ietf-interfaces is
* loaded, and this is not always the case.
* Therefore, the backend must be started with -- -r to enable the reset function
*/
static int _reset = 0;
/* forward */
static int example_stream_timer_setup(clicon_handle h);
@ -212,6 +220,26 @@ example_statedata(clicon_handle h,
return retval;
}
/*! Upgrade configuration from one version to another
* @param[in] h Clicon handle
* @param[in] xms Module state differences
* @retval 0 OK
* @retval -1 Error
*/
int
example_upgrade(clicon_handle h,
cxobj *xms)
{
int retval = -1;
if (xms)
clicon_log_xml(LOG_NOTICE, xms, "%s", __FUNCTION__);
retval = 0;
// done:
return retval;
}
/*! Plugin state reset. Add xml or set state in backend machine.
* Called in each backend plugin. plugin_reset is called after all plugins
* have been initialized. This give the application a chance to reset
@ -223,6 +251,7 @@ example_statedata(clicon_handle h,
* @param[in] db Name of database. Not may be other than "running"
* In this example, a loopback interface is added
* @note This assumes example yang with interfaces/interface
* @see example_start which sets the _reset varaible
*/
int
example_reset(clicon_handle h,
@ -233,6 +262,8 @@ example_reset(clicon_handle h,
int ret;
cbuf *cbret = NULL;
if (!_reset)
goto ok;
if (xml_parse_string("<config><interfaces xmlns=\"urn:ietf:params:xml:ns:yang:ietf-interfaces\"><interface>"
"<name>lo</name><type>ex:loopback</type>"
"</interface></interfaces></config>", NULL, &xt) < 0)
@ -252,6 +283,7 @@ example_reset(clicon_handle h,
cbuf_get(cbret));
goto done;
}
ok:
retval = 0;
done:
if (cbret)
@ -267,7 +299,8 @@ example_reset(clicon_handle h,
* @param[in] argv Argument vector
*
* plugin_start is called once everything has been initialized, right before
* the main event loop is entered. Command line options can be passed to the
* the main event loop is entered.
* From the CLI, command line options can be passed to the
* plugins by using "-- <args>" where <args> is any choice of
* options specific to the application. These options are passed to the
* plugin_start function via the argc and argv arguments which
@ -278,6 +311,16 @@ example_start(clicon_handle h,
int argc,
char **argv)
{
char c;
opterr = 0;
optind = 1;
while ((c = getopt(argc, argv, "r")) != -1)
switch (c) {
case 'r':
_reset = 1;
break;
}
return 0;
}
@ -296,6 +339,7 @@ static clixon_plugin_api api = {
example_exit, /* exit */
.ca_reset=example_reset, /* reset */
.ca_statedata=example_statedata, /* statedata */
.ca_upgrade=example_upgrade, /* upgrade configuration */
.ca_trans_begin=NULL, /* trans begin */
.ca_trans_validate=transaction_validate,/* trans validate */
.ca_trans_complete=NULL, /* trans complete */