I have the below complex yet small XML snippet saved in a file, with multiple entries of ENVDETAILS.

<OUTMOST>
        <MYENVDETAILS>
                <ENVDETAILS id="abc" >
                        <DMGRHOST>a.b.c.d</DMGRHOST>
                        <CELL>XYZ</CELL>
                        <NODE nodeid="1" >
                                <NODEHOST>v.x.y.z</NODEHOST>
                                <IHSNODE>v_ihsnode</IHSNODE>
                                <IHSJVM ihsjvmtype="log_ihs" >
                                        <IHSJVMNAME>abc_logihs1</IHSJV
+MNAME>
                                </IHSJVM>
                                <IHSJVM ihsjvmtype="appihs" >
                                        <IHSJVMNAME>abc_appihs1</IHSJV
+MNAME>
                                </IHSJVM>
                                <JVM jvmtype="nodeagent" >
                                        <JVMNAME>nodeagent</JVMNAME>
                                </JVM>
                                <JVM jvmtype="api" >
                                        <JVMNAME>abc_api1.1</JVMNAME>
                                        <JVMNAME>abc_api1.2</JVMNAME>
                                </JVM>
                        </NODE>
                </ENVDETAILS>
        </MYENVDETAILS>
</OUTMOST>
[download]

Few things we must know:

a). nodeid is not unique.

b). ENVDETAILS id is unique.

I wanted to achieve/perform the following things:

1). Display all the ENVDETAILS ids: [output should have all ids: abc]

2). Display all the jvms corresponding to ENVDETAILS ids & after checking the jvm type: [input: (id=abc)(jvmtype=api) output should have all jvms of type 'api' from ENV id 'abc' i.e.: abc_api1.1, abc_api1.2 ]

3). Display the NODEHOST of JVMNAME is entered as input: [input: jvm=abc_logihs1output should be NODEHOST of jvm 'abc_logihs1' i.e.: v.x.y.z]

4). Display all the jvmtype present on the NODEHOST entered as a input: [input: NODEHOST=v.x.y.z output should be: log_ihs, appihs, nodeagent, api]

5). Display the CELL of NODEHOST is entered as a input: [input: NODEHOST=v.x.y.z output should be: XYZ ]

6). Display the nodeid when NODEHOST is entered as a input: [input: NODEHOST=v.x.y.z output should be: 1 ]

7). Display the DMGR when JVMNAME is entered as input: [input: jvm=abc_api1.1output should be : a.b.c.d ]

8). Display the ENVDETAILS when JVMNAME is entered as input: [input: jvm=abc_api1.1output should be : abc ]

Please help. I am using XML::Smart to achieve few things, however I am learning perl.

I have only written code for 1st point.

use XML::Smart;
use strict;
use warnings;

$ENVFILE="/appl/TOPOLOGY.xml";
my $ENVxml = XML::Smart->new($ENVFILE) || die ("Could not find details
+ file.");
my $env = $ARGV[0];

if ( $ARGV[0] eq "fetch" ) {
        my @envname=$ENVxml->{OUTMOST}->{MYENVDETAILS}->{ENVDETAILS}('
+[@]','id');
foreach my $i (@envname) {
                print "$i\n";
}
}
[download]

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