I found some information on proxy failover and HttpClient, but not much. I was
wondering, though, if my approach is OK. I realize there are inefficiencies,
but before I go there, I want to know if I am even on the right track.
I extended DefautRoutePlanner and implemented the determineProxy method.
In that method I get the list of potential proxies and then test them. I
return the first one in the list that works. (Also, when I find one that works,
I remember it so I don't need to test it again.)
In my constructor for my route planner, I create a separate HttpClient instance
that just uses the DefaultRoutePlanner, which returns NULL for determineProxy().
Has anyone done anything like this?
Thanks,
Mark
private boolean testProxy(URI targetURI, Proxy proxy) {
boolean rval;
if (proxy.type() != Proxy.Type.DIRECT) {
InetSocketAddress address = (InetSocketAddress)
proxy.address();
HttpHost host = new
HttpHost(address.getHostName(), address.getPort(),
ApacheNetworkImpl.SCHEME_HTTP);
try {
URI uri = new URI(host.toURI());
RequestBuilder rb =
RequestBuilder.get(uri);
HttpUriRequest request = rb.build();
try {
HttpResponse resp =
testClient.execute(request);
rval = true;
}
catch (IOException ex) {
rval = false;
connectFailed(targetURI,
address, ex);
}
finally {
request.abort();
}
}
catch (URISyntaxException ex) {
rval = false;
}
}
else
rval = true;
return rval;
}
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