Question

我愿执行大的行政指挥,其参数是 j。

指挥部是:

{ enablesharding : "test" }
{ shardcollection : "test.test_collection", key : {"number":1} }

How can I do it from java driver?

The following Code don t work:

mongo.getDb("admin").command("{shardcollection : "test.test_collection", key:"number":1} }")

Answer 1

我刚刚发现这一点。

DB db = mongo.getDB("admin");
DBObject cmd = new BasicDBObject();
cmd.put("shardcollection", "testDB.x");
cmd.put("key", new BasicDBObject("userId", 1));
CommandResult result = db.command(cmd);

Answer 2

I just want to add that Julias s answer is correct, but now it s deprecated. You could use new API (Document class is from package org.bson):

MongoDatabase database = client.getDatabase("admin");
Document documentA = database.runCommand(new Document("enablesharding", "test"));
Document documentB = database.runCommand(
        new Document("shardcollection", "testDB.x").append("key", new Document("userId", 1)));

Answer 3

Have you ensured you have authenticated to the db successfully?

您是否曾尝试过db.eval(COMMAND_THAT_YOU_WANT_TO_EVAL);

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