Added utility to low-level manipulation with queue [#BSADM-4999].

utils/zookeeper-create-entry-to-download-part/main.cpp

@@ -0,0 +1,46 @@
+#include <DB/Storages/MergeTree/ReplicatedMergeTreeLogEntry.h>
+#include <zkutil/ZooKeeper.h>
+#include <boost/program_options.hpp>
+
+
+int main(int argc, char ** argv)
+try
+{
+	boost::program_options::options_description desc("Allowed options");
+	desc.add_options()
+	("help,h", "produce help message")
+	("address,a", boost::program_options::value<std::string>()->required(),
+	 "addresses of ZooKeeper instances, comma separated. Example: example01e.yandex.ru:2181")
+	("path,p", boost::program_options::value<std::string>()->required(), "path of replica queue to insert node (without trailing slash)")
+	("name,n", boost::program_options::value<std::string>()->required(), "name of part to download")
+	;
+
+	boost::program_options::variables_map options;
+	boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
+
+	if (options.count("help"))
+	{
+		std::cout << "Insert log entry to replication queue to download part from any replica." << std::endl;
+		std::cout << "Usage: " << argv[0] << " [options]" << std::endl;
+		std::cout << desc << std::endl;
+		return 1;
+	}
+
+	std::string path = options.at("path").as<std::string>();
+	std::string name = options.at("name").as<std::string>();
+
+	zkutil::ZooKeeper zookeeper(options.at("address").as<std::string>());
+
+	DB::ReplicatedMergeTreeLogEntry entry;
+	entry.type = DB::ReplicatedMergeTreeLogEntry::MERGE_PARTS;
+	entry.parts_to_merge = {name};
+	entry.new_part_name = name;
+
+	zookeeper.create(path + "/queue-", entry.toString(), zkutil::CreateMode::PersistentSequential);
+	return 0;
+}
+catch (const Poco::Exception & e)
+{
+	std::cerr << DB::getCurrentExceptionMessage(true) << '\n';
+	throw;
+}