31.7. Script Execution Using the Hot Rod C++ Client

#include "infinispan/hotrod/ConfigurationBuilder.h"
#include "infinispan/hotrod/RemoteCacheManager.h"
#include "infinispan/hotrod/RemoteCache.h"
#include "infinispan/hotrod/Version.h"
#include "infinispan/hotrod/JBasicMarshaller.h"
using namespace infinispan::hotrod;
int main(int argc, char** argv) {
    // Configure the client
    ConfigurationBuilder builder;
    builder.addServer().host("127.0.0.1").port(11222).protocolVersion(
        Configuration::PROTOCOL_VERSION_24);
    RemoteCacheManager cacheManager(builder.build(), false);
    try {
    // Create the cache with the given marshallers
    auto *km = new JBasicMarshaller<std::string>();
    auto *vm = new JBasicMarshaller<std::string>();
    RemoteCache<std::string, std::string> cache = cacheManager.getCache<
        std::string, std::string>(km, &Marshaller<std::string>::destroy,
        vm, &Marshaller<std::string>::destroy,
        std::string("namedCache"));
    cacheManager.start();
    
    // Obtain a reference to the ___script_cache
    RemoteCache<std::string, std::string> scriptCache =
        cacheManager.getCache<std::string, std::string>(
        "___script_cache", false);
    // Install on the server the getValue script
    std::string getValueScript(
        "// mode=local,language=javascript\n "
        "var cache = cacheManager.getCache(\"namedCache\");\n "
        "var ct = cache.get(\"accessCounter\");\n "
        "var c = ct==null ? 0 : parseInt(ct);\n "
        "cache.put(\"accessCounter\",(++c).toString());\n "
        "cache.get(\"privateValue\") ");
    std::string getValueScriptName("getValue.js");
    std::string pGetValueScriptName =
        JBasicMarshaller<std::string>::addPreamble(getValueScriptName);
    std::string pGetValueScript =
        JBasicMarshaller<std::string>::addPreamble(getValueScript);
    scriptCache.put(pGetValueScriptName, pGetValueScript);
    // Install on the server the get access counter script
    std::string getAccessScript(
        "// mode=local,language=javascript\n "
        "var cache = cacheManager.getCache(\"namedCache\");\n "
        "cache.get(\"accessCounter\")");
    std::string getAccessScriptName("getAccessCounter.js");
    std::string pGetAccessScriptName =
        JBasicMarshaller<std::string>::addPreamble(getAccessScriptName);
    std::string pGetAccessScript =
        JBasicMarshaller<std::string>::addPreamble(getAccessScript);
    scriptCache.put(pGetAccessScriptName, pGetAccessScript);

    // The following is a continuation of the above example
    cache.put("privateValue", "Counted Access Value");
    std::map<std::string, std::string> s;
    // Execute the getValue script
    std::vector<unsigned char> execValueResult = cache.execute(
        getValueScriptName, s);
    // Execute the getAccess script
    std::vector<unsigned char> execAccessResult = cache.execute(
        getAccessScriptName, s);

    std::string value(
        JBasicMarshallerHelper::unmarshall<std::string>(
            (char*) execValueResult.data()));
    std::string access(
        JBasicMarshallerHelper::unmarshall<std::string>(
            (char*) execAccessResult.data()));

    std::cout << "Returned value is '" << value
        << "' and has been accessed: " << access << " times."
        << std::endl;

  } catch (const Exception& e) {
  std::cout << "is: " << typeid(e).name() << '\n';
  std::cerr << "fail unexpected exception: " << e.what() << std::endl;
  return 1;
  }

	cacheManager.stop();
	return 0;
}