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Manual Reference Pages  -  VM::EC2::INSTANCE::STATE::CHANGE (3)

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NAME

VM::EC2::Instance::State::Change - Represent an EC2 instance’s change in state.

CONTENTS

SYNOPSIS



     # find all stopped instances
    @instances = $ec2->describe_instances(-filter=>{instance-state-name=>stopped});

    # start them
    @state_change = $ec2->start_instances(@instances)

    foreach my $sc (@state_change) {
        my $instanceId    = $sc->instanceId;
        my $currentState  = $sc->currentState;
        my $previousState = $sc->previousState;
    }

    # poll till the first instance is running
    sleep 2 until $state_change[0]->current_status eq running;



DESCRIPTION

This object represents a state change in an Amazon EC2 instance. It is returned by VM::EC2 start_instances(), stop_instances(), terminate_instances(), reboot_instances() and the corresponding VM::EC2::Instance methods. In addition, this object is returned by calls to VM::EC2::Instance->instanceState().

METHODS

These object methods are supported:



 instanceId      -- The instanceId.
 currentState    -- The instanceIds current state AT THE TIME
                     THE STATECHANGE OBJECT WAS CREATED. One of
                     "terminated", "running", "stopped", "stopping",
                     "shutting-down".
 previousState   -- The instanceIDs previous state AT THE TIME
                     THE STATECHANGE OBJECT WAS CREATED.



Note that currentState and previousState return a VM::EC2::Instance::State object, which provides both string-readable forms and numeric codes representing the state.

In addition, the method provides the following convenience method:

CW$state = CW$state_change->current_status()

This method returns the current state of the instance. This is the correct method to call if you are interested in knowing what the instance is doing right now.

    STRING OVERLOADING

In a string context, the method will return the string representation of currentState.

SEE ALSO

VM::EC2 VM::EC2::Generic VM::EC2::State VM::EC2::Instance

AUTHOR

Lincoln Stein <lincoln.stein@gmail.com>.

Copyright (c) 2011 Ontario Institute for Cancer Research

This package and its accompanying libraries is free software; you can redistribute it and/or modify it under the terms of the GPL (either version 1, or at your option, any later version) or the Artistic License 2.0. Refer to LICENSE for the full license text. In addition, please see DISCLAIMER.txt for disclaimers of warranty.

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perl v5.20.3 VM::EC2::INSTANCE::STATE::CHANGE (3) 2016-04-03

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