iot-sol/node_modules/hope-center/lib/center.js

Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes

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Copyright (c) 2016, Intel Corporation

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      this list of conditions and the following disclaimer.
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      may be used to endorse or promote products derived from this software
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var B = require("hope-base");
var P = require("hope-hub-center-shared").protocol;
var log = B.log.for_category("center");
var _ = require("lodash");
var FE = require("./frontend");
var HeartBeatServer = require("./heartbeat_server");
var BuiltinHub = require("./built_in_hub");

var Center =
module.exports = function(config) {
  config = config || {};
  this.type = "Center";
  this.id = config.id || B.unique_id("HOPE_CENTER_");
  this.name = config.name || this.id;
  this.description = config.description || this.name;
  this.mnode = B.check(config.mnode, "center", "Should have a mnode to create");
  this.em = B.check(config.entity_manager,
    "center", "Should have a entity_manager to create");
  this.config = config;
  this.config_path = config.config_path;
  B.check(config.appbundle_path, "center", "should have an app bundle");
  this.appbundle_path = B.path.abs(config.appbundle_path, this.config_path);
  this.user_setting = this.load_user_setting();
  this.frontends = {};

  this.errors = [];

  var self = this;
  B.set_exception_hook(function(e, category, msg, type) {
    var stack = B.get_raw_stack(e);
    var err = {
      time: new Date(),
      subsystem: self.name,
      category: category,
      type: type || B.err.CHECK_FAIL,
      message: msg,
      stack: stack.slice(1)
    };
    e.$type = err.type;
    self.announce_error(err);
  });

  B.net.set_exception_hook(function(err) {
    if (_.isError(err)) {
      if (!err.$check) {
        var stack = B.get_raw_stack(err);
        err.$type = B.err.UNHANDLED_EXCEPTION;
        self.announce_error({
          time: new Date(),
          subsystem: self.name,
          category: "Unhandled Exception",
          type: B.err.UNHANDLED_EXCEPTION,
          message: err.message,
          stack: stack
        });
      }
      return err.$type;
    }

    return to_string(err);
  });

  if (config.dev_web_app) {
    this.frontends.dev = new FE.DevFrontEnd(this, config.dev_web_app);

    //TODO: Export to session-manager
    global.$hope__dev_webapp = this.frontends.dev.web_app;
  }
  if (config.user_web_app) {
    this.frontends.user = new FE.UserFrontEnd(this, config.user_web_app);
  }

  if (this.frontends.dev) {
    this.frontends.dev.$forward = this.frontends.user;
  }

  if (config.heartbeat_server) {
    this.heartbeat_server = new HeartBeatServer(this, config.heartbeat_server);
  }

  this.built_in_hub = null;
  this.workflow_engine = config.workflow_engine;
  var self = this;
  this.workflow_engine.event.on("debug", function(data) {
    if (self.frontends.dev) {
      self.frontends.dev.graph_emit(data.workflow_id, "debug", data);
    }
  });
  this.workflow_engine.event.on("workflow_load", function(data) {
    _.forOwn(self.frontends, function(f) {
      f.setup_graph_socket(data.id);
    });
  });
};

Center.create$ = function(config) {
  var center = new Center(config);
  return center.init$().then(function() {
   return center;
 });
};

Center.prototype.get_info = function() {
  return {
    id: this.id,
    mnode_id: this.mnode.id
  };
};

Center.prototype.get_brief = function() {
  return {
    id: this.id,
    mnode_id: this.mnode.id
  };
};


Center.prototype.init$ = function() {
  var tasks = [];
  var self = this;
  tasks.push(this._init_em$());
  tasks.push(this.mnode.accept$(P.EM_FULLINFO, this.on_entities_fullinfo.bind(this)));
  tasks.push(this.mnode.accept$(P.CLAIM_AS_HUB, this.on_hub_claimed.bind(this)));
  tasks.push(this.mnode.subscribe_all$(P.ANNOUNCE_ERROR, this.announce_error.bind(this)));
  tasks.push(this.mnode.subscribe_all$(P.CLAIM_AS_HUB, this.on_hub_claimed.bind(this)));
  tasks.push(this.mnode.subscribe_all$(P.HUB_LEAVE, this.on_hub_left.bind(this)));
  tasks.push(this._init_frontends$());

  return Promise.all(tasks).then(function() {
    if (self.heartbeat_server) {
      self.heartbeat_server.enable();
    }
    return self.mnode.publish$(P.CLAIM_AS_CENTER, self.get_info());
  }).then(function() {
    return BuiltinHub.create$(self).then(function(hub) {
      self.built_in_hub = hub;
      return BuiltinHub.init$(hub, self);
    });
  }).then(function() {
    return self.mnode.enable_rpc$();
  }).then(function() {
    return self.em.app_store.list$().then(function(ids) {
      _.forEach(ids, function(id) {
        _.forOwn(self.frontends, function(f) {
          f.setup_app_socket(id);
        });
      });
    });
  }).then(function() {
    return self.em.graph_store.list$().then(function(ids) {
      _.forEach(ids, function(id) {
        _.forOwn(self.frontends, function(f) {
          f.setup_graph_socket(id);
        });
      });
    });
  });
};




Center.prototype.leave$ = function() {
  var self = this;

  return this.built_in_hub.leave$()
  .then(function() {
    self.mnode.disable_rpc$();
  })
  .then(function() {
    if (self.heartbeat_server) {
      self.heartbeat_server.disable();
    }
    var tasks = [];
    tasks.push(self.mnode.publish$(P.CENTER_LEAVE, self.get_brief()));
    tasks.push(self.mnode.clean_subscribe_all$());
    tasks.push(self.mnode.clean_subscribe$());
    tasks.push(self.mnode.clean_accepts$());
    return Promise.all(tasks);
  }).then(function() {
    return self.destroy_related_webapp$();
  }).finally(function() {
    return self.mnode.dispose$();
  });
};

Center.prototype.destroy_related_webapp = function() {
  var all = [];
  if (this.config.user_web_app) {
    all.push(this.config.user_web_app.$destroy());
  }
  if (this.config.dev_web_app) {
    all.push(this.config.dev_web_app.$destroy());
  }
  return Promise.all(all);
};

Center.prototype.on_hub_claimed = function(hub_info) {
  log("Hub Claimed", hub_info);
  var self = this;
  var hub_id = hub_info.id;
  var hub_mnode_id = hub_info.mnode_id;
  self.beat$(hub_id).done();//beat
  this.make_lock(hub_id).lock_as_promise$(function() {
    return self.em.hub__get$(hub_id)
    .then(function(hub) {
      if (_.isUndefined(hub)) {
        log("Found New Hub", hub_info);
        var tasks = [];
        tasks.push(self.mnode.subscribe$(hub_mnode_id, P.EM_CHANGED, self.on_entities_changed.bind(self)));
        tasks.push(self.mnode.send$(hub_mnode_id, P.NEED_EM_FULLINFO, self.get_info()));

        return Promise.all(tasks);
      }
    });
  }).done();
};

Center.prototype.force_hub_leave = function(hub_id) {
  var self = this;
  this.make_lock(hub_id).lock_as_promise$(function() {
    return self.em.hub__get$(hub_id).then(function(hub) {
      if (hub) {
        self.on_hub_left({
          id: hub_id,
          mnode_id: hub.mnode
        });
      }
    });
  }).done();
};

Center.prototype.on_hub_left = function(hub_brief) {
  log("Hub Left", hub_brief);
  var self = this;
  this.make_lock(hub_brief.id).lock_as_promise$(function() {
    return self.em.hub__remove$(hub_brief.id)
    .then(function() {
      if (self.heartbeat_server) {
        return self.heartbeat_server.leave$(hub_brief.id);
      }
    })
    .then(function() {
      var tasks = [];
      tasks.push(self.mnode.clean_subscribe$(hub_brief.mnode_id));
      return Promise.all(tasks);
    });
  }).done();
};

Center.prototype.on_entities_changed = function(data) {
  var hub_id = data.hub;
  var hub_mnode_id = data.hub_mnode_id;
  var list = data.list;
  var time = data.time;
  var self = this;
  self.beat$(hub_id).done();//beat
  log("EM_CHANGED From Hub", hub_id, data);
  this.make_lock(hub_id).lock_as_promise$(function() {
    return self.em.hub__get$(hub_id)
    .then(function(hub) {
      if (_.isUndefined(hub)) {
        log("EM_CHANGED hub not exist", hub_id);
        return self.mnode.send$(hub_mnode_id, P.NEED_EM_FULLINFO, self.get_info());
      }
      else if (check_emchanged_time_match(time, hub.timestamp)) {
        log("EM_CHANGED match", hub_id, time, "existing timestamp:", hub.timestamp);
        return self.em.update$(list)
        .then(function() {
          return self.em.hub__get$(hub_id);
        })
        .then(function(new_hub) {
          return self._set_hub_timestamp$(new_hub, time);
        });
      }
      else if (check_emchanged_time_new(time, hub.timestamp)) {
        log("EM_CHANGED ahead", hub_id, time, "existing timestamp:", hub.timestamp);
        return self.mnode.send$(hub_mnode_id, P.NEED_EM_FULLINFO, self.get_info());
      }
      else {
        log("EM_CHANGED old", hub_id, time, "existing timestamp:", hub.timestamp);
        return;
      }
    });
  }).done();
};

Center.prototype.on_entities_fullinfo = function(data) {
  var hub_id = data.hub;
  var list = data.list;
  var time = data.time;
  var self = this;
  self.beat$(hub_id).done();//beat
  log("EM_FULLINFO From Hub", hub_id);
  this.make_lock(hub_id).lock_as_promise$(function() {
    return self.em.hub__get$(hub_id)
    .then(function(hub) {
      if (_.isUndefined(hub)) {
        log("FULLINFO of New Hub", hub_id, time);
        return self.em.update$(list)
        .then(function() {
          return self.em.hub__get$(hub_id);
        })
        .then(function(new_hub) {
          return self._set_hub_timestamp$(new_hub, time);
        });
      }
      else if (check_fullinfo_time(time, hub.timestamp)) {
        log("FULLINFO of Existing Hub", hub_id, time, "existing timestamp:", hub.timestamp);
        return self.em.hub__remove$(hub_id)
        .then(function() {
          return self.em.update$(list);
        })
        .then(function() {
          return self._set_hub_timestamp$(hub, time);
        });
      }
      else {
        log("Old FULLINFO", hub_id, time, "existing timestamp:", hub.timestamp);
        return;
      }
    });
  }).done();
};

Center.prototype._ensure_user_exists$ = function(user, role, passwd) {
  var self = this;
  return self.em.user__find$(user, null).then(function(u) {
    if (u) {
      return false;
    }
    self.em.user__add$({
      id: user,
      name: user,
      role: role,
      passwd: passwd,
      appbundle_path: B.path.join(self.appbundle_path, user)
    });
    return true;
  });
};

Center.prototype._init_em$ = function() {
  var self = this;
  if (this.config.auth) {
    // default password is ""
    return self._ensure_user_exists$("admin", "admin", "LcCbizWvnANvw/Kc28Bfuw==").then(function(added) {
      if (!added) {
        // guest can be deleted
        return Promise.resolve();
      }
      return self._ensure_user_exists$("guest", "guest", "7lf26KynsWJIvOEM9QWHVQ==");
    });
  }
  return self.em.app__load_from_bundle$(self.appbundle_path, null);
};

Center.prototype._set_hub_timestamp$ = function(hub, timestamp) {
  hub.timestamp = timestamp;
  return this.em.hub_store.set$(hub.id, hub);
};

Center.prototype._init_frontends$ = function() {
  var tasks = [];

  if (this.frontends.dev) {
    tasks.push(this.frontends.dev.init$());
  }
  if (this.frontends.user) {
    tasks.push(this.frontends.user.init$());
  }
  return Promise.all(tasks);
};

Center.prototype.make_lock = function(key) {
  return B.lock.make("__HOPE__/CENTER/" + this.id + "/" +
    (_.isUndefined(key) ? "" : key));
};

Center.prototype.beat$ = function(hub_id) {
  var self = this;
  return Promise.resolve()
  .then(function() {
    if (self.heartbeat_server) {
      return self.heartbeat_server.beat$(hub_id);
    }
  });
};
// -----------------------------------------------
// Workflow related. all lock the graph_id.
//              each operation is atomic
// -----------------------------------------------
Center.prototype.workflow_create$ = function(graph) {
  _.forOwn(this.frontends, function(f) {
    f.setup_graph_socket(graph.id);
  });
  return this.em.graph__add$(graph);
};

Center.prototype.workflow_create_nr$ = function(graph) {
  _.forOwn(this.frontends, function(f) {
    f.setup_graph_socket(graph.id);
  });
  return this.em.graph__add_nodered$(graph, this.built_in_hub.id);
};


Center.prototype.workflow_update$ = function(graph) {
  _.forOwn(this.frontends, function(f) {
    f.setup_graph_socket(graph.id);
  });
  return this.em.graph__update$(graph);
};

Center.prototype.workflow_start$ = function(graph_id, tracing) {
  log("workflow_start", graph_id);
  var self = this;
  var graph;
  return this.make_lock(graph_id).lock_as_promise$(function() {
    return self.em.graph__get$(graph_id)
    .then(function(graph_json) {
      var specid_array = [];
      graph_json.graph.nodes.forEach(function(node) {
        specid_array.push(node.spec);
      });
      graph = graph_json;
      return self.em.spec__get$(specid_array);
    })
    .then(function(specs) {
      graph = self.em.graph__remove_unused_nr_config_node(graph, specs);
      // The specs we got from database is an array
      // However, the engine expects a hashtable for the specs
      // so need index it first
      return self.workflow_engine.start$(graph,
        _.keyBy(specs, "id"), tracing);
    });
  });
};

Center.prototype.workflow_remove$ = function(id) {
  if (this.workflow_engine.workflows[id] &&
    this.workflow_engine.workflows[id].status === "enabled") {
    return Promise.reject(new Error("workflow " + id + " is still running and cannot remove!"));
  }
  delete this.workflow_engine.workflows[id];
  _.forOwn(this.frontends, function(f) {
    f.remove_graph_socket(id);
  });
  return this.em.graph__remove$(id);
};


Center.prototype.workflow_get_status = function(graph_id) {
  // need to interpret internal status to external
  switch (this.workflow_engine.get_status(graph_id)) {
    case "unloaded":
      return "Non-exist";
    case "enabled":
      return "Working";
    case "disabled":
      return "Paused";
    case "installed":
      return "Stopped";
    case "loaded":
      return "Idle";
  }
};

Center.prototype.workflow_get_trace = function(graph_id) {
  log("workflow_get_trace", graph_id);
  return this.workflow_engine.get_trace(graph_id).trace;
};

Center.prototype.workflow_get_debug_trace = function(graph_id) {
  log("workflow_get_debug_trace", graph_id);
  return this.workflow_engine.get_debug_trace(graph_id).trace;
};

Center.prototype.workflow_set_debug_for_node$ = function(graph_id, node_id, is_debug) {
  log("workflow_set_debug_for_node", graph_id);
  var self = this;
  // We need to persistent this change as well
  return this.make_lock(graph_id).lock_as_promise$(function() {
    self.workflow_engine.set_debug_for_node(graph_id, node_id, is_debug);
    return self.workflow_update$(
      self.workflow_engine.ensure_get_workflow(graph_id).json);
  });
};


Center.prototype.workflow_stop$ = function(graph_id) {
  log("workflow_stop", graph_id);
  var self = this;
  return this.make_lock(graph_id).lock_as_promise$(function() {
    return self.workflow_engine.stop$(graph_id);
  });
};

Center.prototype.workflow_pause$ = function(graph_id) {
  log("workflow_pause", graph_id);
  var self = this;
  return this.make_lock(graph_id).lock_as_promise$(function() {
    return self.workflow_engine.pause$(graph_id);
  });
};

Center.prototype.workflow_resume$ = function(graph_id) {
  log("workflow_resume", graph_id);
  var self = this;
  return this.make_lock(graph_id).lock_as_promise$(function() {
    return self.workflow_engine.resume$(graph_id);
  });
};


// -------------------------------------------------
// Helper
// -------------------------------------------------
function check_fullinfo_time(coming_time, existing_time) {
  return B.time.compare_hrtime(coming_time.now, existing_time.now) === 1;
}

function check_emchanged_time_match(coming_time, existing_time) {
  return B.time.compare_hrtime(coming_time.last, existing_time.now) === 0;
}


function check_emchanged_time_new(coming_time, existing_time) {
  return B.time.compare_hrtime(coming_time.now, existing_time.now) === 1;
}

Center.prototype.get_user_proxy = function(type, hub_id) {
  var self = this;
  type = type || "Center";
  if(type === "Center") {
    return self.user_setting.proxy;
  } else {
    B.check(hub_id, "center", "get hub user proxy must provide hub_id");
    self.em.hub__get$(hub_id).then(function(hub) {
      return self.mnode.invoke_rpc$(hub.mnode, "get_user_proxy");
    });
  }
};

Center.prototype.set_user_proxy = function(value) {
  var self = this;
  var apply_to_all_hub = value.apply_to_all_hub;
  delete value['apply_to_all_hub'];
  this.user_setting.proxy = value;
  this.store_user_setting();
  if(apply_to_all_hub) {
    this.em.hub__list$().then(function(hubs) {
      hubs = hubs || [];
      hubs.map(function(hub) {
        if(hub.type !== "builtin") {
          self.mnode.invoke_rpc$(hub.mnode, "set_user_proxy", value);
        }
      });
    }).then(function() {
      return;
    });
  }
};

Center.prototype.get_npm_account = function() {
  return this.user_setting.npm;
};

Center.prototype.set_npm_account = function(value) {
  this.user_setting.npm = value;
  this.store_user_setting();
};
Center.prototype.load_user_setting = function() {
  var json_path = B.path.abs("./user_setting.json", this.config.config_path);
  var user_setting = {};
  if(B.fs.file_exists(json_path)) {
    var json_content = B.fs.read_json(json_path);
    user_setting = json_content?json_content:{};
  } else {
    user_setting = {npm:{},proxy:{}};
    B.fs.write_json(json_path, user_setting);
  }
  return user_setting;
};

Center.prototype.store_user_setting = function() {
  var json_path = B.path.abs("./user_setting.json", this.config.config_path);
  B.fs.write_json(json_path, this.user_setting);
};



// -------------------------------------------------
// rpc invoke
// -------------------------------------------------

Center.prototype.add_hope_thing$ = function(thing) {
  var self = this;
  return this.em.hub__get$(thing.hub)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "add_hope_thing", thing);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.install_hope_thing$ = function(hub_id, name, version) {
  var self = this;
  var send_hub = hub_id;
  return this.em.hub__get$(hub_id)
    .then(function(hub) {
      send_hub = hub;
      return self.mnode.invoke_rpc$(hub.mnode, "install_hope_thing", [name, version, hub_id]);
    })
    .then(function(data) {
      self.on_entities_changed(data);
      return;
    });
};

Center.prototype.update_hope_thing$ = function(thing) {
  var self = this;
  return this.em.thing__get_hub$(thing.id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "update_hope_thing", thing);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.remove_hope_thing$ = function(thing_id) {
  var self = this;
  return this.em.thing__get_hub$(thing_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "remove_hope_thing", thing_id);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.add_hope_service$ = function(service) {
  var self = this;
  return this.em.thing__get_hub$(service.thing)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "add_hope_service", service);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.install_hope_service$ = function(thing, name, version) {
  var self = this;
  return this.em.thing__get_hub$(thing)
    .then(function(hub) {
      return self.mnode.invoke_rpc$(hub.mnode, "install_hope_service", [name, version, thing]);
    })
    .then(function(data) {
      self.on_entities_changed(data);
      return;
    });
};

Center.prototype.update_hope_service$ = function(service) {
  var self = this;
  return this.em.service__get_hub$(service.id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "update_hope_service", service);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.remove_hope_service$ = function(service_id) {
  var self = this;
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "remove_hope_service", service_id);
  })
  .then(function(data) {
    self.on_entities_changed(data);
    return;
  });
};

Center.prototype.list_service_files$ = function(service_id) {
  var self = this;
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "list_service_files", service_id);
  });
};

Center.prototype.read_service_file$ = function(service_id, file_path) {
  var self = this;
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "read_service_file", [service_id, file_path]);
  });
};

Center.prototype.write_service_file$ = function(service_id, file_path, content) {
  var self = this;
  var hub;
  B.check(!self.workflow_engine.has_started_workflows(), "center",
    "there still has started workflows, cannnot write_service_file");
  return this.em.service__get_hub$(service_id)
  .then(function(_hub) {
    hub = _hub;
    return self.mnode.invoke_rpc$(hub.mnode, "write_service_file", [service_id, file_path, content]);
  })
  .then(function() {
    return self.mnode.invoke_rpc$(hub.mnode, "reload_service", service_id);
  });
};

Center.prototype.remove_service_file$ = function(service_id, file_path) {
  var self = this;
  var hub;
  B.check(!self.workflow_engine.has_started_workflows(), "center",
    "there still has started workflows, cannnot remove_service_file");
  return this.em.service__get_hub$(service_id)
  .then(function(_hub) {
    hub = _hub;
    return self.mnode.invoke_rpc$(hub.mnode, "remove_service_file", [service_id, file_path]);
  })
  .then(function() {
    return self.mnode.invoke_rpc$(hub.mnode, "reload_service", service_id);
  });

};


Center.prototype.publish_hope_service$ = function(service_id, package_json) {
  var settings = {};
  var self = this;

  if (self.user_setting) {
    var proxy = self.user_setting.proxy;
    if (proxy && proxy.http_proxy) {
      settings.http = proxy.http_proxy;
    }
    if (proxy && proxy.https_proxy) {
      settings.https = proxy.https_proxy;
    }

    var npm = self.user_setting.npm;
    if (npm && npm.token) {
      settings.auth = {token: npm.token};
    }
    else if (npm && npm.username) {
      settings.auth = {username: npm.username, password: npm.password, email: npm.email};
    }
  }
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "publish_hope_service", [service_id, package_json, settings]);
  });
};

Center.prototype.install_service_package$ = function(service_id, package_name, version) {
  var self = this;
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "install_service_package", [service_id, package_name, version]);
  });
};

Center.prototype.uninstall_service_package$ = function(service_id, package_name) {
  var self = this;
  return this.em.service__get_hub$(service_id)
  .then(function(hub) {
    return self.mnode.invoke_rpc$(hub.mnode, "uninstall_service_package", [service_id, package_name]);
  });
};

var exc_seq = 1;

Center.prototype.announce_error = function(e) {
  e.seq = exc_seq++;
  if (this.frontends.dev) {
    this.frontends.dev.sys_emit("error", e);
  }
  if (this.errors.length > 200) {
    this.errors = this.errors.slice(-100);
  }
  this.errors.push(e);
  console.log(e);
};