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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "localservicepolicy.h"
#include <vespa/documentapi/messagebus/documentprotocol.h>
#include <vespa/messagebus/routing/verbatimdirective.h>
#include <vespa/messagebus/messagebus.h>
#include <vespa/vespalib/util/stringfmt.h>
#include <vespa/log/log.h>
LOG_SETUP(".localservicepolicy");
namespace documentapi {
LocalServicePolicy::CacheEntry::CacheEntry() :
_offset(0),
_generation(0),
_recipients()
{
}
LocalServicePolicy::LocalServicePolicy(const string ¶m) :
_lock(),
_address(param),
_cache()
{
}
LocalServicePolicy::~LocalServicePolicy() = default;
void
LocalServicePolicy::select(mbus::RoutingContext &ctx)
{
mbus::Route route = ctx.getRoute();
route.setHop(0, getRecipient(ctx));
ctx.addChild(route);
}
void
LocalServicePolicy::merge(mbus::RoutingContext &context)
{
DocumentProtocol::merge(context);
}
string
LocalServicePolicy::getCacheKey(const mbus::RoutingContext &ctx) const
{
return ctx.getRoute().getHop(0).toString();
}
mbus::Hop
LocalServicePolicy::getRecipient(mbus::RoutingContext &ctx)
{
std::lock_guard guard(_lock);
CacheEntry &entry = update(ctx);
if (entry._recipients.empty()) {
mbus::Hop hop = ctx.getRoute().getHop(0);
hop.setDirective(ctx.getDirectiveIndex(), std::make_shared<mbus::VerbatimDirective>("*"));
return hop;
}
if (++entry._offset >= entry._recipients.size()) {
entry._offset = 0;
}
return entry._recipients[entry._offset];
}
LocalServicePolicy::CacheEntry &
LocalServicePolicy::update(mbus::RoutingContext &ctx)
{
uint32_t upd = ctx.getMirror().updates();
CacheEntry &entry = _cache.insert(std::map<string, CacheEntry>::value_type(getCacheKey(ctx), CacheEntry())).first->second;
if (entry._generation != upd) {
entry._generation = upd;
entry._recipients.clear();
string pattern = vespalib::make_string("%s*%s",
ctx.getHopPrefix().c_str(),
ctx.getHopSuffix().c_str());
slobrok::api::IMirrorAPI::SpecList entries = ctx.getMirror().lookup(pattern);
string self = _address.empty() ? toAddress(ctx.getMessageBus().getConnectionSpec()) : _address;
for (slobrok::api::IMirrorAPI::SpecList::iterator it = entries.begin();
it != entries.end(); ++it)
{
LOG(debug, "Matching self '%s' to '%s'.", self.c_str(), it->second.c_str());
if (self == toAddress(it->second)) {
LOG(debug, "Match, add it");
entry._recipients.push_back(mbus::Hop::parse(it->first));
}
}
}
return entry;
}
string
LocalServicePolicy::toAddress(const string &connection)
{
if (connection.substr(0, 4) == "tcp/") {
uint32_t pos = connection.find_first_of(':', 4);
if (pos > 4) {
return connection.substr(4, pos - 4);
}
}
return "";
}
}
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