Changeset 63f3746

Timestamp:

Jun 17, 2009 6:29:41 PM (16 years ago)

Author:

Ted Faber <faber@…>

Branches:

axis_example, compt_changes, info-ops, master, version-1.30, version-2.00, version-3.01, version-3.02

Children:

cc58813

Parents:

af542ea

Message:

Add image rendering functionality to fedd_client

File:

• fedd/fedd_client.py (modified) (4 diffs)

fedd/fedd_client.py

@@ -4 +4 @@
 import os
 import pwd
+import tempfile
+import subprocess
 
 from federation import fedid, service_error
@@ -144 +146 @@
                 type="string", help="output certificate file")
 
+class fedd_image_opts(fedd_exp_data_opts):
+    def __init__(self):
+        fedd_exp_data_opts.__init__(self)
+        self.add_option("-o", "--output", dest="outfile", type="string",
+                help="output image file")
+        self.add_option("-F", "--format", dest="format", type="choice", 
+                choices=("jpg", "png", "dot"),
+                help="Output file format override")
+        self.add_option("-P", "--program", dest="neato", default=None,
+                type="string",
+                help="Program compatible with dot (from graphviz) used to " + \
+                        "render image")
+
 def exit_with_fault(dict, out=sys.stderr):
     """ Print an error message and exit.
@@ -378 +393 @@
             print resp_dict
 
+
+# Querying experiment data follows the same control flow regardless of the
+# specific data retrieved.  This class encapsulates that control flow.
+class image(fedd_rpc):
+    def __init__(self): 
+        """
+        Null constructor
+        """
+
+        fedd_rpc.__init__(self, "Vtopo")
+
+    def gen_image(self, d, file, fmt, neato):
+
+        # Open up a temporary file for dot to turn into a visualization
+        try:
+            df, dotname = tempfile.mkstemp(prefix='fedd_client', suffix=".dot")
+            dotfile = os.fdopen(df, 'w')
+        except IOError:
+            raise service_error(service_error.internal,
+                    "Failed to open file in genviz")
+
+        if not neato:
+            for f in ['/usr/bin/neato', '/usr/local/bin/neato', 
+                    '/usr/bin/dot', '/usr/local/bin/dot']:
+                if os.access(f, os.X_OK):
+                    neato = f
+                    break
+            else:
+                sys.exit("Cannot find graph rendering program")
+
+        cmd = [neato, '-Gsplines=true']
+        if fmt != 'dot': cmd.append('-T%s' % fmt)
+        if file:
+            cmd.append('-o')
+            cmd.append(file)
+        cmd.append(dotname)
+
+        print >>dotfile, "graph G {"
+        print >>dotfile, '\tnode [fontname=arial,fontsize=9,label="\N"];'
+        print >>dotfile, '\tedge [fontname=arial,fontsize=9,label="\N"];\n'
+
+        for n in d.get('node', []):
+            print >>dotfile, '\t%s [shape=box,style=filled,\\' % n['vname']
+            print >>dotfile, '\t\tcolor=black,fillcolor="#60f8c0",regular=1]'
+
+
+        lans = { }
+        links = { }
+
+        # Collect lan members (we have to draw extra stuff for these)
+        for n in d.get('lan', []):
+            v = n['vname']
+            m = n['member']
+            if m.find(':') != -1:
+                m = m[0:m.find(':')]
+            if lans.has_key(v):
+                lans[v].append(m)
+            elif links.has_key(v):
+                links[v].append(m)
+                if len(links[v]) > 2:
+                    lans[v] = links[v]
+                    del links[v]
+            else:
+                links[v] = [m]
+
+        # Encode the lans and the links
+        for l in lans.keys():
+            print >>dotfile, '\t%s [shape=ellipse, style=filled,\\' % l
+            print >>dotfile,'\t\tcolor=black,fillcolor="#80c0f8",regular=1]'
+            for n in lans[l]:
+                print >>dotfile, '\t%s -- %s' % (l, n)
+
+        for k, l in links.items():
+            if len(l) == 2:
+                print >>dotfile, '\t%s -- %s [label="%s"]' % (l[0], l[1], k)
+
+        print >>dotfile, "}"
+        dotfile.close()
+
+        # Redirect the drawing program stderr
+        dev_null = open("/dev/null", "w")
+        rv = subprocess.call(cmd, stderr=dev_null)
+        os.remove(dotname)
+        dev_null.close()
+        if rv != 0:
+            sys.exit("Error creating graph")
+
+
+
+    def __call__(self):
+        """
+        The control flow.  Compose the request and print the response.
+        """
+        # Process the options using the customized option parser defined above
+        parser = fedd_image_opts()
+
+        (opts, args) = parser.parse_args()
+
+        if opts.trusted:
+            if ( not os.access(opts.trusted, os.R_OK) ) :
+                sys.exit("Cannot read trusted certificates (%s)" % opts.trusted)
+
+        if opts.debug > 0: opts.tracefile=sys.stderr
+
+        (user, cert) = self.get_user_info([])
+
+        if opts.cert != None: cert = opts.cert
+
+        if cert == None:
+            sys.exit("No certificate given (--cert) or found")
+
+        if os.access(cert, os.R_OK):
+            fid = fedid(file=cert)
+        else:
+            sys.exit("Cannot read certificate (%s)" % cert)
+
+        if opts.exp_name and opts.exp_certfile:
+            sys.exit("Only one of --experiment_cert and " +\
+                    "--experiment_name permitted");
+
+        if opts.exp_certfile:
+            exp_id = { 'fedid': fedid(file=opts.exp_certfile) }
+
+        if opts.exp_name:
+            exp_id = { 'localname' : opts.exp_name }
+
+        if opts.format and opts.outfile:
+            fmt = opts.format
+            file = opts.outfile
+        elif not opts.format and opts.outfile:
+            fmt = opts.outfile[-3:]
+            if fmt not in ("png", "jpg", "dot"):
+                sys.exit("Unexpected file type and no format specified")
+            file = opts.outfile
+        elif opts.format and not opts.outfile:
+            fmt = opts.format
+            file = None
+        else:
+            fmt="dot"
+            file = None
+
+
+        req = { 'experiment': exp_id }
+
+        try:
+            resp_dict = self.do_rpc(req,
+                    opts.url, opts.transport, cert, opts.trusted, 
+                    serialize_only=opts.serialize_only,
+                    tracefile=opts.tracefile)
+        except self.RPCException, e:
+            exit_with_fault(\
+                    {'desc': e.desc, 'errstr': e.errstr, 'code': e.code})
+        except RuntimeError, e:
+            print e
+            sys.exit("Error processing RPC: %s" % e)
+
+
+        if resp_dict.has_key('vtopo'):
+            self.gen_image(resp_dict['vtopo'], file, fmt, opts.neato)
+        else:
+            sys.exit("Bad response. %s" % e.message)
+
 class terminate(fedd_rpc):
     def __init__(self): 
@@ -734 +911 @@
         'vtopo': exp_data('Vtopo'),\
         'vis': exp_data('Vis'),\
+        'image': image(),\
         'info': exp_data('Info'),\
         'terminate': terminate(),\