我能够使用这些文档在我的服务器上安装示例插件:http://docs.neo4j.org/chunked/milestone/server-plugins.html
现在我想开发自己的插件,但不确定如何对其进行调试和单元测试。我该在哪里阅读更多关于此的信息以及最佳的服务器插件开发实践?
您可以像开发简单的Java项目一样开发插件,测试插件也很容易,只需在单元测试中实例化它们,并将节点、GraphDatabaseService和参数传递给插件方法并检查结果。
我的插件:
package ru.a360.neo4j.plugins;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.server.plugins.*;
import org.neo4j.server.rest.repr.Representation;
import org.neo4j.server.rest.repr.ValueRepresentation;
import org.neo4j.tooling.GlobalGraphOperations;
import java.util.logging.Logger;
@Description("An extension to the Neo4j Server for find routes between two nodes")
public class WarmUp extends ServerPlugin
{
private Logger logger = Logger.getLogger(WarmUp.class.getName());
public WarmUp()
{
}
@Name("warm_up")
@Description("Warm up all nodes and relationships")
@PluginTarget(GraphDatabaseService.class)
public Representation warmUp(@Source GraphDatabaseService graphDb)
{
long t0 = System.currentTimeMillis();
int relCount = 0;
int nodesCount = 0;
GlobalGraphOperations ggo = GlobalGraphOperations.at(graphDb);
for (Node n: ggo.getAllNodes())
{
for (String prop: n.getPropertyKeys())
{
n.getProperty(prop);
}
nodesCount++;
}
for (Relationship rel: ggo.getAllRelationships())
{
for (String prop: rel.getPropertyKeys())
{
rel.getProperty(prop);
}
relCount++;
}
logger.info("warmup;" + (System.currentTimeMillis() - t0) / 1000.0 );
return ValueRepresentation.string("WARMED UP " + nodesCount + " NODES AND " + relCount + " RELATIONSHIPS");
}
}
主目录下有一个新的字符串:main/java/META-INF/services/org.neo4j.server.plugins.ServerPlugin。
ru.a360.neo4j.plugins.WarmUp
我希望编写类似这样的测试(test/java/ru/a360/neo4j/plugins/TestNeo.java):
package ru.a360.neo4j.plugins;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class TestNeo {
@Before
public void prepareTestData()
{
}
@After
public void destroyTestDatabase()
{
}
@Test
public void myTest1()
{
}
}