From 24a099f4089569f2e1863c6ab455b844c7cacd3f Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Wed, 14 Sep 2016 08:58:51 +0200 Subject: [PATCH] contrib/examples/myplugin.c: Use a compound literal in the example plugin, too. --- contrib/examples/myplugin.c | 38 +++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/contrib/examples/myplugin.c b/contrib/examples/myplugin.c index e1b89f6c..71fb5f8b 100644 --- a/contrib/examples/myplugin.c +++ b/contrib/examples/myplugin.c @@ -85,36 +85,50 @@ static int my_init (void) } /* static int my_init (void) */ /* - * This function is called in regular intervalls to collect the data. + * This is a utility function used by the read callback to populate a + * value_list_t and pass it to plugin_dispatch_values. */ -static int my_read (void) +static int my_submit (gauge_t value) { - value_t values[1]; /* the size of this list should equal the number of - data sources */ value_list_t vl = VALUE_LIST_INIT; - /* do the magic to read the data */ - values[0].gauge = random (); - - vl.values = values; + /* Convert the gauge_t to a value_t and add it to the value_list_t. */ + vl.values = &(value_t) { .gauge = value }; vl.values_len = 1; - vl.time = time (NULL); + + /* Only set vl.time yourself if you update multiple metrics (i.e. you + * have multiple calls to plugin_dispatch_values()) and they need to all + * have the same timestamp. */ + /* vl.time = cdtime(); */ + sstrncpy (vl.host, hostname_g, sizeof (vl.host)); sstrncpy (vl.plugin, "myplugin", sizeof (vl.plugin)); /* it is strongly recommended to use a type defined in the types.db file * instead of a custom type */ - sstrncpy (vl.type, "myplugin", sizeof (vl.plugin)); + sstrncpy (vl.type, "myplugin", sizeof (vl.type)); /* optionally set vl.plugin_instance and vl.type_instance to reasonable * values (default: "") */ /* dispatch the values to collectd which passes them on to all registered * write functions */ - plugin_dispatch_values (&vl); + return plugin_dispatch_values (&vl); +} + +/* + * This function is called in regular intervalls to collect the data. + */ +static int my_read (void) +{ + /* do the magic to read the data */ + gauge_t value = random (); + + if (my_submit (value) != 0) + WARNING ("myplugin plugin: Dispatching a random value failed."); /* A return value != 0 indicates an error and the plugin will be skipped * for an increasing amount of time. */ - return 0; + return 0; } /* static int my_read (void) */ /* -- 2.30.2