private BsonValue ExecuteOperation(EvalOperation operation, IWriteBinding binding, bool async)
{
if (async)
{
return operation.ExecuteAsync(binding, CancellationToken.None).GetAwaiter().GetResult();
}
else
{
return operation.Execute(binding, CancellationToken.None);
}
}
public static void MapReduce()
{
var databaseName = new DatabaseNamespace(DbConnection.Db.DatabaseNamespace.DatabaseName);
var code = (BsonJavaScript) @"
function () {
var docs = db.Entry.find({isShown: true}, {'publishDate':1});
var length = docs.count();
var merged = { };
for (var i = 0; i < length; i++)
{
var value = docs[i].publishDate;
var date = (new Date(value)).getUTCFullYear().toString() + '/' + ('0' + ((new Date(value)).getUTCMonth() + 1)).slice(-2);
if (date in merged) {
merged[date] += 1;
} else {
merged[date] = 1;
}
}
db.DateSummary.remove({});
db.DateSummary.insert({_id:'dateGrouping', value:merged});
}";
var messageEncodingSettings = new MessageEncoderSettings();
var operation = new EvalOperation(databaseName, code, messageEncodingSettings);
var session = new CoreSessionHandle(NoCoreSession.Instance);
var writeBinding = new WritableServerBinding(DbConnection.Db.Client.Cluster, session);
operation.Execute(writeBinding, CancellationToken.None);
}
public static void MapReduce()
{
var databaseName = new DatabaseNamespace(DbConnection.Db.DatabaseNamespace.DatabaseName);
var code = (BsonJavaScript) @"
function () {
var docs = db.Entry.find({isShown: true}, {'tag':1});
var length = docs.count();
var tags = [];
for (var i = 0; i < length; i++)
{
var doc = docs[i];
tags = tags.concat(doc.tag);
}
var merged = { };
for (var i = 0; i < tags.length; i++)
{
var tag = tags[i].replace('.', '\uff0e');
if (tag in merged) {
merged[tag] += 1;
} else {
merged[tag] = 1;
}
}
db.TagSummary.remove({});
db.TagSummary.insert({_id:'tag', value:merged});
}";
var messageEncodingSettings = new MessageEncoderSettings();
var operation = new EvalOperation(databaseName, code, messageEncodingSettings);
var session = new CoreSessionHandle(NoCoreSession.Instance);
var writeBinding = new WritableServerBinding(DbConnection.Db.Client.Cluster, session);
operation.Execute(writeBinding, CancellationToken.None);
}
public BsonValue RunScript(string command, CancellationToken cancellationToken)
{
var script = new BsonJavaScript(command);
var operation = new EvalOperation(_database.DatabaseNamespace, script, null);
var writeBinding = new WritableServerBinding(_client.Cluster);
return(operation.Execute(writeBinding, CancellationToken.None));
}
public IActionResult RunScript(string query)
{
if (string.IsNullOrEmpty(query))
return Json(new { Result = false, Message = "Empty query!" });
try
{
var bscript = new BsonJavaScript(query);
var operation = new EvalOperation(_mongoDBContext.Database().DatabaseNamespace, bscript, null);
var writeBinding = new WritableServerBinding(_mongoDBContext.Database().Client.Cluster, NoCoreSession.NewHandle());
var result = operation.Execute(writeBinding, CancellationToken.None);
var xx = result["_ns"];
return Json(new { Result = true, Message = result.ToString() });
}
catch (Exception ex)
{
return Json(new { Result = false, Message = ex.Message });
}
}
/// <summary>
/// Evaluates JavaScript code at the server.
/// </summary>
/// <param name="args">The args.</param>
/// <returns>The result of evaluating the code.</returns>
public virtual BsonValue Eval(EvalArgs args)
{
if (args == null)
{
throw new ArgumentNullException("args");
}
if (args.Code == null)
{
throw new ArgumentException("Code is null.", "args");
}
var operation = new EvalOperation(_namespace, args.Code, GetMessageEncoderSettings())
{
Args = args.Args,
MaxTime = args.MaxTime,
NoLock = args.Lock.HasValue ? !args.Lock : null
};
using (var binding = _server.GetWriteBinding())
{
return(operation.Execute(binding));
}
}