From 7c950e5ede352e45177a2ab3da5b2bbda334bd0b Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 1 Jun 2016 09:06:05 +0100
Subject: Parallel extract and lookup

---
 gentoobrowse-api/client/helpers.h  | 39 ++++++++++++++++++++++++++++++++++++++
 gentoobrowse-api/client/search.cpp | 10 ++++------
 2 files changed, 43 insertions(+), 6 deletions(-)
 create mode 100644 gentoobrowse-api/client/helpers.h

diff --git a/gentoobrowse-api/client/helpers.h b/gentoobrowse-api/client/helpers.h
new file mode 100644
index 0000000..5221910
--- /dev/null
+++ b/gentoobrowse-api/client/helpers.h
@@ -0,0 +1,39 @@
+#ifndef GENTOOBROWSE_CLIENT_HELPERS_H
+#define GENTOOBROWSE_CLIENT_HELPERS_H
+
+#include <map>
+#include <Ice/AsyncResult.h>
+#include <mutex>
+
+template<typename Key, typename Target, typename Collection, typename Proxy>
+std::map<Key, Target>
+asyncMapRelated(const Collection & collection, Proxy p,
+		Key Collection::value_type::element_type::* member,
+		Ice::AsyncResultPtr (Proxy::element_type::*f)(Key,
+			const ::IceInternal::Function<void (const Target &)> &response,
+			const ::IceInternal::Function<void (const ::Ice::Exception &)> &exception,
+			const ::IceInternal::Function<void (bool)> & ))
+{
+	std::map<Key, Target> rtn;
+	std::map<Key, Ice::AsyncResultPtr> jobs;
+	std::mutex m;
+	for (const auto & item : collection) {
+		Key v = item.get()->*member;
+		if (jobs.find(v) == jobs.end()) {
+			jobs.insert({ v, (p.get()->*f)(v, [&rtn, v, &m](const Target & t) {
+						m.lock();
+						rtn.insert({v, t});
+						m.unlock();
+					}, [](const ::Ice::Exception & ex) { throw ex; } , nullptr)
+				});
+		}
+	}
+	for (const auto & j : jobs) {
+		j.second->waitForCompleted();
+	}
+	return rtn;
+}
+
+
+#endif
+
diff --git a/gentoobrowse-api/client/search.cpp b/gentoobrowse-api/client/search.cpp
index dd4baf1..7ec91be 100644
--- a/gentoobrowse-api/client/search.cpp
+++ b/gentoobrowse-api/client/search.cpp
@@ -2,20 +2,18 @@
 #include <fprintbf.h>
 #include <boost/algorithm/string/join.hpp>
 #include "main.h"
+#include "helpers.h"
 
 class search : public Module {
 	public:
 		void run(Gentoo::PortagePrx p, const std::vector<std::string> & a) const override
 		{
 			auto pkgs = p->getPackagesSearch(boost::algorithm::join(a, " "));
-			std::map<int, Gentoo::CategoryPtr> cats;
+			auto cats = asyncMapRelated(pkgs, p, &Gentoo::Package::categoryid,
+					&IceProxy::Gentoo::Portage::begin_getCategory);
 			fprintbf(stdout, "Found %d packages:\n", pkgs.size());
 			for (const auto & pkg : pkgs) {
-				auto ci = cats.find(pkg->categoryid);
-				if (ci == cats.end()) {
-					ci = cats.insert({pkg->categoryid, p->getCategory(pkg->categoryid)}).first;
-				}
-				fprintbf(stdout, "%s / %s\n\t%s\n", ci->second->name, pkg->name, pkg->description);
+				fprintbf(stdout, "%s / %s\n\t%s\n", cats[pkg->categoryid]->name, pkg->name, pkg->description);
 			}
 		}
 };
-- 
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