/// =-=-=-=-=-=-=-
/// @brief get the next resource shared pointer given this resources name
/// as well as the object's hierarchy string
irods::error get_next_child_in_hier(
const std::string& _name,
const std::string& _hier,
irods::resource_child_map& _cmap,
irods::resource_ptr& _resc ) {
irods::error result = SUCCESS();
// =-=-=-=-=-=-=-
// create a parser and parse the string
irods::hierarchy_parser parse;
irods::error err = parse.set_string( _hier );
if ( ( result = ASSERT_PASS( err, "Failed in set_string" ) ).ok() ) {
// =-=-=-=-=-=-=-
// get the next resource in the series
std::string next;
err = parse.next( _name, next );
if ( ( result = ASSERT_PASS( err, "Failed in next." ) ).ok() ) {
// =-=-=-=-=-=-=-
// get the next resource from the child map
if ( ( result = ASSERT_ERROR( _cmap.has_entry( next ), CHILD_NOT_FOUND, "Child map missing entry: \"%s\"",
next.c_str() ) ).ok() ) {
// =-=-=-=-=-=-=-
// assign resource
_resc = _cmap[ next ].second;
}
}
}
return result;
} // get_next_child_in_hier
/// =-=-=-=-=-=-=-
/// @brief get the next resource shared pointer given this resources name
/// as well as the object's hierarchy string
irods::error get_next_child_in_hier(
const std::string& _name,
const std::string& _hier,
irods::resource_child_map& _cmap,
irods::resource_ptr& _resc ) {
// =-=-=-=-=-=-=-
// create a parser and parse the string
irods::hierarchy_parser parse;
irods::error err = parse.set_string( _hier );
if ( !err.ok() ) {
std::stringstream msg;
msg << "get_next_child_in_hier - failed in set_string for [";
msg << _hier << "]";
return PASSMSG( msg.str(), err );
}
// =-=-=-=-=-=-=-
// get the next resource in the series
std::string next;
err = parse.next( _name, next );
if ( !err.ok() ) {
std::stringstream msg;
msg << "get_next_child_in_hier - failed in next for [";
msg << _name << "] for hier ["
<< _hier << "]";
return PASSMSG( msg.str(), err );
}
// =-=-=-=-=-=-=-
// get the next resource from the child map
if ( !_cmap.has_entry( next ) ) {
std::stringstream msg;
msg << "get_next_child_in_hier - child map missing entry [";
msg << next << "]";
return ERROR( CHILD_NOT_FOUND, msg.str() );
}
// =-=-=-=-=-=-=-
// assign resource
_resc = _cmap[ next ].second;
return SUCCESS();
} // get_next_child_in_hier
/// =-=-=-=-=-=-=-
/// @brief find the next valid child resource for create operation
irods::error get_next_valid_child_resource(
irods::plugin_property_map& _prop_map,
irods::resource_child_map& _cmap,
irods::resource_ptr& _resc ) {
// =-=-=-=-=-=-=-
// counter and flag
int child_ctr = 0;
bool child_found = false;
// =-=-=-=-=-=-=-
// while we have not found a child and have not
// exhausted all the children in the map
while ( !child_found &&
child_ctr < _cmap.size() ) {
// =-=-=-=-=-=-=-
// increment child counter
child_ctr++;
// =-=-=-=-=-=-=-
// get the next_child property
std::string next_child;
irods::error err = _prop_map.get< std::string >( NEXT_CHILD_PROP, next_child );
if ( !err.ok() ) {
return PASSMSG( "round_robin_redirect - get property for 'next_child' failed.", err );
}
// =-=-=-=-=-=-=-
// get the next_child resource
if ( !_cmap.has_entry( next_child ) ) {
std::stringstream msg;
msg << "child map has no child by name [";
msg << next_child << "]";
return PASSMSG( msg.str(), err );
}
// =-=-=-=-=-=-=-
// request our child resource to test it
irods::resource_ptr resc = _cmap[ next_child ].second;
// =-=-=-=-=-=-=-
// get the resource's status
int resc_status = 0;
err = resc->get_property<int>( irods::RESOURCE_STATUS, resc_status );
if ( !err.ok() ) {
return PASSMSG( "failed to get property", err );
}
// =-=-=-=-=-=-=-
// determine if the resource is up and available
if ( INT_RESC_STATUS_DOWN != resc_status ) {
// =-=-=-=-=-=-=-
// we found a valid child, set out variable
_resc = resc;
child_found = true;
}
else {
// =-=-=-=-=-=-=-
// update the next_child as we do not have a valid child yet
err = update_next_child_resource( _prop_map );
if ( !err.ok() ) {
return PASSMSG( "update_next_child_resource failed", err );
}
}
} // while
// =-=-=-=-=-=-=-
// return appropriately
if ( child_found ) {
return SUCCESS();
}
else {
return ERROR( NO_NEXT_RESC_FOUND, "no valid child found" );
}
} // get_next_valid_child_resource
