Clear Neo4j Embedded database -

-

with new version of spring data neo4j can't use neo4jhelper.cleandb(db);

so, effective way completly clear embedded neo4j database in application?

i have implemented own util method purpose, method slow:

public static void cleandb(neo4jtemplate template) {     template.query("match (n) optional match (n)-[r]-() delete n,r", null); }

how clear/delete database ?

updated

this similar question how reset / clear / delete neo4j database? don't know how programmatically shutdown embedded neo4j , how start after deleting.

i use spring data neo4j , based on user request i'd clear/delete existing database , recreate new data. how start new embedded database after suggested invocation of shutdown method ?

use case:

on working application have configured embedded database:

graphdatabaseservice graphdb = new graphdatabasefactory()                 .newembeddeddatabasebuilder(environment.getproperty(neo4j_embedded_database_path_property))                 .setconfig(graphdatabasesettings.node_keys_indexable, "name,description")                 .setconfig(graphdatabasesettings.node_auto_indexing, "true")                 .newgraphdatabase();

also, pre populate database 1000000 nodes. on user request need clear database , populate new data. how correctly , quick clear existing database ?

can call neo4j database api new node creation after database.shutdown() or need initialize new database before it?

see other answer on related question. inside of java, can shut down embedded database graphdatabaseservice#shutdown() method.

from there, there pile of different ways can delete underlying directory, see other answer.

so general answer can still same:

  1. shutdown database using neo4j java api
  2. delete database contents off of disk

Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile:
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo
Read more