github.com/wallyworld/juju@v0.0.0-20161013125918-6cf1bc9d917a/worker/uniter/agent.go (about)

     1  // Copyright 2012-2015 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package uniter
     5  
     6  import "github.com/juju/juju/status"
     7  
     8  // setAgentStatus sets the unit's status if it has changed since last time this method was called.
     9  func setAgentStatus(u *Uniter, agentStatus status.Status, info string, data map[string]interface{}) error {
    10  	u.setStatusMutex.Lock()
    11  	defer u.setStatusMutex.Unlock()
    12  	if u.lastReportedStatus == agentStatus && u.lastReportedMessage == info {
    13  		return nil
    14  	}
    15  	u.lastReportedStatus = agentStatus
    16  	u.lastReportedMessage = info
    17  	logger.Debugf("[AGENT-STATUS] %s: %s", agentStatus, info)
    18  	return u.unit.SetAgentStatus(agentStatus, info, data)
    19  }
    20  
    21  // reportAgentError reports if there was an error performing an agent operation.
    22  func reportAgentError(u *Uniter, userMessage string, err error) {
    23  	// If a non-nil error is reported (e.g. due to an operation failing),
    24  	// set the agent status to Failed.
    25  	if err == nil {
    26  		return
    27  	}
    28  	err2 := setAgentStatus(u, status.Failed, userMessage, nil)
    29  	if err2 != nil {
    30  		logger.Errorf("updating agent status: %v", err2)
    31  	}
    32  }