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and.go
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/
and.go
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package condition
import (
"fmt"
"github.com/dafanshu/benthos/v3/lib/log"
"github.com/dafanshu/benthos/v3/lib/metrics"
"github.com/dafanshu/benthos/v3/lib/types"
)
//------------------------------------------------------------------------------
func init() {
Constructors[TypeAnd] = TypeSpec{
constructor: NewAnd,
Summary: `
And is a condition that returns the logical AND of its children conditions.`,
Description: `
For example, the following resolves true if a message contains both 'foo' and
'bar':
` + "```yaml" + `
and:
- text:
operator: contains
arg: foo
- text:
operator: contains
arg: bar
` + "```" + ``,
}
}
//------------------------------------------------------------------------------
// AndConfig is a configuration struct containing fields for the And condition.
type AndConfig []Config
// NewAndConfig returns a AndConfig with default values.
func NewAndConfig() AndConfig {
return AndConfig{}
}
//------------------------------------------------------------------------------
// And is a condition that returns the logical AND of all children.
type And struct {
children []Type
mCount metrics.StatCounter
mTrue metrics.StatCounter
mFalse metrics.StatCounter
}
// NewAnd returns an And condition.
func NewAnd(
conf Config, mgr types.Manager, log log.Modular, stats metrics.Type,
) (Type, error) {
children := []Type{}
for i, childConf := range conf.And {
ns := fmt.Sprintf("%v", i)
child, err := New(childConf, mgr, log.NewModule("."+ns), metrics.Namespaced(stats, ns))
if err != nil {
return nil, fmt.Errorf("failed to create child '%v': %v", childConf.Type, err)
}
children = append(children, child)
}
return &And{
children: children,
mCount: stats.GetCounter("count"),
mTrue: stats.GetCounter("true"),
mFalse: stats.GetCounter("false"),
}, nil
}
//------------------------------------------------------------------------------
// Check attempts to check a message part against a configured condition.
func (c *And) Check(msg types.Message) bool {
c.mCount.Incr(1)
for _, child := range c.children {
if !child.Check(msg) {
c.mFalse.Incr(1)
return false
}
}
c.mTrue.Incr(1)
return true
}
//------------------------------------------------------------------------------