I am using snmp4j.jar. I want to do a snmpwalk on if-table to get ifDescr from all the rows. Using netsnmp :
snmpwalk -v2c -c**** -t 1 1.2.3.4 ifDescr I can get ...
IF-MIB::ifDescr.1 = STRING: ATM0
IF-MIB::ifDescr.2 = STRING: Ethernet0
....
I want to do the same with using snmp4j. Any idea how to do that? I followed some tutorial but I am not clear exactly what to do.
Here is the snippet of the code . Hope it help someone .
public Map<String, InterfaceInfoObject> getTableAsStrings(OID[] oids, String communityString) {
TableUtils tUtils = new TableUtils(snmp, new DefaultPDUFactory());
List<TableEvent> events = tUtils.getTable(getTarget(), oids, null, null);
Map<String,InterfaceInfoObject> indexMap = new LinkedHashMap<String,InterfaceInfoObject>();
for (TableEvent event : events) {
if(event.isError()) {
throw new RuntimeException(event.getErrorMessage());
}
for(VariableBinding vb: event.getColumns()) {
InterfaceInfoObject infterfaceInfo = new InterfaceInfoObject();
String oid = vb.getOid().toString();
String index = event.getIndex().toString();
String colValue = vb.getVariable().toString();
if(indexMap.containsKey(index)){
getInferfaceObjectAndsetValues(indexMap, oid, index, colValue);
}else{
putInferfaceInfoObjInMap(indexMap, infterfaceInfo, oid, index,
colValue);
}
}
}
return indexMap;
Related
I am new to ElasticsearchTemplate. I want to get 1000 documents from Elasticsearch based on my query.
I have used QueryBuilder to create my query , and it is working perfectly.
I have gone through the following links , which states that it is possible to achieve big data sets using scan and scroll.
link one
link two
I am trying to implement this functionality in the following section of code, which I have copy pasted from one of the link , mentioned above.
But I am getting following error :
The type ResultsMapper is not generic; it cannot be parameterized with arguments <myInputDto>.
MyInputDto is a class with #Document annotation in my project.
End of the day , I just want to retrieve 1000 documents from Elasticsearch.
I tried to find size parameter but I think it is not supported.
String scrollId = esTemplate.scan(searchQuery, 1000, false);
List<MyInputDto> sampleEntities = new ArrayList<MyInputDto>();
boolean hasRecords = true;
while (hasRecords) {
Page<MyInputDto> page = esTemplate.scroll(scrollId, 5000L,
new ResultsMapper<MyInputDto>() {
#Override
public Page<MyInputDto> mapResults(SearchResponse response) {
List<MyInputDto> chunk = new ArrayList<MyInputDto>();
for (SearchHit searchHit : response.getHits()) {
if (response.getHits().getHits().length <= 0) {
return null;
}
MyInputDto user = new MyInputDto();
user.setId(searchHit.getId());
user.setMessage((String) searchHit.getSource().get("message"));
chunk.add(user);
}
return new PageImpl<MyInputDto>(chunk);
}
});
if (page != null) {
sampleEntities.addAll(page.getContent());
hasRecords = page.hasNextPage();
} else {
hasRecords = false;
}
}
What is the issue here ?
Is there any other alternative to achieve this?
I will be thankful if somebody could tell me how this ( code ) is working in the back end.
Solution 1
If you want to use ElasticsearchTemplate, it would be much simpler and readable to use CriteriaQuery, as it allows to set the page size with setPageable method. With scrolling, you can get next sets of data:
CriteriaQuery criteriaQuery = new CriteriaQuery(Criteria.where("productName").is("something"));
criteriaQuery.addIndices("prods");
criteriaQuery.addTypes("prod");
criteriaQuery.setPageable(PageRequest.of(0, 1000));
ScrolledPage<TestDto> scroll = (ScrolledPage<TestDto>) esTemplate.startScroll(3000, criteriaQuery, TestDto.class);
while (scroll.hasContent()) {
LOG.info("Next page with 1000 elem: " + scroll.getContent());
scroll = (ScrolledPage<TestDto>) esTemplate.continueScroll(scroll.getScrollId(), 3000, TestDto.class);
}
esTemplate.clearScroll(scroll.getScrollId());
Solution 2
If you'd like to use org.elasticsearch.client.Client instead of ElasticsearchTemplate, then SearchResponse allows to set the number of search hits to return:
QueryBuilder prodBuilder = ...;
SearchResponse scrollResp = client.
prepareSearch("prods")
.setScroll(new TimeValue(60000))
.setSize(1000)
.setTypes("prod")
.setQuery(prodBuilder)
.execute().actionGet();
ObjectMapper mapper = new ObjectMapper();
List<TestDto> products = new ArrayList<>();
try {
do {
for (SearchHit hit : scrollResp.getHits().getHits()) {
products.add(mapper.readValue(hit.getSourceAsString(), TestDto.class));
}
LOG.info("Next page with 1000 elem: " + products);
products.clear();
scrollResp = client.prepareSearchScroll(scrollResp.getScrollId())
.setScroll(new TimeValue(60000))
.execute()
.actionGet();
} while (scrollResp.getHits().getHits().length != 0);
} catch (IOException e) {
LOG.error("Exception while executing query {}", e);
}
I'm having some trouble doing aggregation on a particular column in HBase.
This is the snippet of code I tried:
Configuration config = HBaseConfiguration.create();
AggregationClient aggregationClient = new AggregationClient(config);
Scan scan = new Scan();
scan.addColumn(Bytes.toBytes("drs"), Bytes.toBytes("count"));
ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
Long sum = aggregationClient.sum(Bytes.toBytes("DEMO_CALCULATIONS"), ci , scan);
System.out.println(sum);
sum returns a value of null.
The aggregationClient API works fine if I do a rowcount.
I was trying to follow the directions in http://michaelmorello.blogspot.in/2012/01/row-count-hbase-aggregation-example.html
Could there be a problem with me using a LongColumnInterpreter when the 'count' field was an int? What am I missing in here?
You can only use long(8bytes) to do sum with default setting.
Cause in the code of AggregateImplementation's getSum method, it handle all the returned KeyValue as long.
List<KeyValue> results = new ArrayList<KeyValue>();
try {
boolean hasMoreRows = false;
do {
hasMoreRows = scanner.next(results);
for (KeyValue kv : results) {
temp = ci.getValue(colFamily, qualifier, kv);
if (temp != null)
sumVal = ci.add(sumVal, ci.castToReturnType(temp));
}
results.clear();
} while (hasMoreRows);
} finally {
scanner.close();
}
and in LongColumnInterpreter
public Long getValue(byte[] colFamily, byte[] colQualifier, KeyValue kv)
throws IOException {
if (kv == null || kv.getValueLength() != Bytes.SIZEOF_LONG)
return null;
return Bytes.toLong(kv.getBuffer(), kv.getValueOffset());
}
I´m trying to use dapper with Oracle (ODP.NET) and I would like to use the "QueryMultiple" functionality.
Passing this string to the QueryMultiple method:
var query = "Select CUST_ID CustId from Customer_info WHERE CUST_ID=:custId;" +
"Select CUST_ID CustId from BCR WHERE CUST_ID=:custId";
I´m getting a ORA-00911: invalid character error
Is there any way to do this or it´s not possible?
Tks
The OP has probably long since solved the issue by now, but as of the time of writing, this question has only one answer and it doesn't really solve the problem of using Dapper's QueryMultiple() method with Oracle. As #Kamolas81 correctly states, by using the syntax from the official examples, one will indeed get the ORA-00933: SQL command not properly ended error message. I spent a while searching for some sort of documentation about how to do QueryMultiple() with Oracle, but I was surprised that there wasn't really one place that had an answer. I would have thought this to be a fairly common task. I thought that I'd post an answer here to save me :) someone some time in the future just in case anybody happens to have this same problem.
Dapper seems to just pass the SQL command straight along to ADO.NET and whatever db provider is executing the command. In the syntax from the examples, where each command is separated by a line break, SQL server will interpret that as multiple queries to run against the database and it will run each of the queries and return the results into separate outputs. I'm not an ADO.NET expert, so I might be messing up the terminology, but the end effect is that Dapper gets the multiple query outputs and then works its magic.
Oracle, though, doesn't recognize the multiple queries; it thinks that the SQL command is malformed and returns the ORA-00933 message. The solution is to use cursors and return the output in a DynamicParameters collection. For example, whereas the SQL Server version would look like this:
var sql =
#"
select * from Customers where CustomerId = #id
select * from Orders where CustomerId = #id
select * from Returns where CustomerId = #id";
the Oracle version of the query would need to look like this:
var sql = "BEGIN OPEN :rslt1 FOR SELECT * FROM customers WHERE customerid = :id; " +
"OPEN :rslt2 FOR SELECT * FROM orders WHERE customerid = :id; " +
"OPEN :rslt3 FOR SELECT * FROM returns Where customerid = :id; " +
"END;";
For queries run against SQL Server, Dapper can handle it from there. However, because we're returning the result sets into cursor parameters, we'll need to use an IDynamicParameters collection to specify parameters for the command. To add an extra wrinkle, the normal DynamicParameters.Add() method in Dapper uses a System.Data.DbType for the optional dbType parameter, but the cursor parameters for the query need to be of type Oracle.ManagedDataAccess.Client.OracleDbType.RefCursor. To solve this, I used the solution which #Daniel Smith proposed in this answer and created a custom implementation of the IDynamicParameters interface:
using Dapper;
using Oracle.ManagedDataAccess.Client;
using System.Data;
public class OracleDynamicParameters : SqlMapper.IDynamicParameters
{
private readonly DynamicParameters dynamicParameters = new DynamicParameters();
private readonly List<OracleParameter> oracleParameters = new List<OracleParameter>();
public void Add(string name, OracleDbType oracleDbType, ParameterDirection direction, object value = null, int? size = null)
{
OracleParameter oracleParameter;
if (size.HasValue)
{
oracleParameter = new OracleParameter(name, oracleDbType, size.Value, value, direction);
}
else
{
oracleParameter = new OracleParameter(name, oracleDbType, value, direction);
}
oracleParameters.Add(oracleParameter);
}
public void Add(string name, OracleDbType oracleDbType, ParameterDirection direction)
{
var oracleParameter = new OracleParameter(name, oracleDbType, direction);
oracleParameters.Add(oracleParameter);
}
public void AddParameters(IDbCommand command, SqlMapper.Identity identity)
{
((SqlMapper.IDynamicParameters)dynamicParameters).AddParameters(command, identity);
var oracleCommand = command as OracleCommand;
if (oracleCommand != null)
{
oracleCommand.Parameters.AddRange(oracleParameters.ToArray());
}
}
}
So all of the code together goes something like this:
using Dapper;
using Oracle.ManagedDataAccess.Client;
using System.Data;
int selectedId = 1;
var sql = "BEGIN OPEN :rslt1 FOR SELECT * FROM customers WHERE customerid = :id; " +
"OPEN :rslt2 FOR SELECT * FROM orders WHERE customerid = :id; " +
"OPEN :rslt3 FOR SELECT * FROM returns Where customerid = :id; " +
"END;";
OracleDynamicParameters dynParams = new OracleDynamicParameters();
dynParams.Add(":rslt1", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":rslt2", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":rslt3", OracleDbType.RefCursor, ParameterDirection.Output);
dynParams.Add(":id", OracleDbType.Int32, ParameterDirection.Input, selectedId);
using (IDbConnection dbConn = new OracleConnection("<conn string here>"))
{
dbConn.Open();
var multi = dbConn.QueryMultiple(sql, param: dynParams);
var customer = multi.Read<Customer>().Single();
var orders = multi.Read<Order>().ToList();
var returns = multi.Read<Return>().ToList();
...
dbConn.Close();
}
Building on greyseal96's helpful answer, I created this implementation of IDynamicParameters:
public class OracleDynamicParameters : SqlMapper.IDynamicParameters
{
private readonly DynamicParameters dynamicParameters;
private readonly List<OracleParameter> oracleParameters = new List<OracleParameter>();
public OracleDynamicParameters(params string[] refCursorNames) {
dynamicParameters = new DynamicParameters();
AddRefCursorParameters(refCursorNames);
}
public OracleDynamicParameters(object template, params string[] refCursorNames) {
dynamicParameters = new DynamicParameters(template);
AddRefCursorParameters(refCursorNames);
}
private void AddRefCursorParameters(params string[] refCursorNames)
{
foreach (string refCursorName in refCursorNames)
{
var oracleParameter = new OracleParameter(refCursorName, OracleDbType.RefCursor, ParameterDirection.Output);
oracleParameters.Add(oracleParameter);
}
}
public void AddParameters(IDbCommand command, SqlMapper.Identity identity)
{
((SqlMapper.IDynamicParameters)dynamicParameters).AddParameters(command, identity);
var oracleCommand = command as OracleCommand;
if (oracleCommand != null)
{
oracleCommand.Parameters.AddRange(oracleParameters.ToArray());
}
}
}
Assuming the same query, it can be used so:
var queryParams = new { id };
string[] refCursorNames = { "rslt1", "rslt2", "rslt3" };
var dynParams = new OracleDynamicParameters(queryParams, refCursorNames);
...
var multi = dbConn.QueryMultiple(sql, param: dynParams);
I suspect this is two or three separate things:
Your first query should not have a semi-colon
There is no new-line character between the queries
The usage notes imply that the bind character is # not : (no idea if this depends on the RDBMS being used).
If you look at the Dapper Google Code page the example given for QueryMultiple() is:
var sql =
#"
select * from Customers where CustomerId = #id
select * from Orders where CustomerId = #id
select * from Returns where CustomerId = #id";
using (var multi = connection.QueryMultiple(sql, new {id=selectedId}))
{
var customer = multi.Read<Customer>().Single();
var orders = multi.Read<Order>().ToList();
var returns = multi.Read<Return>().ToList();
...
}
Remove the semi-colon; add a new line and if you still have issues change the bind character.
I am using dart powerSNMP for .Net.
I am trying to query a table using GetTable(), it does not work for me.
Below C# code does not return any row,
const string address = "xxx.xxx.xx.x";
using (var mgr = new Manager())
{
var slave = new ManagerSlave(mgr);
slave.Socket.ReceiveTimeout = 13000;
try
{
//Retrieve table using GetNext requests
Variable[,] table = slave.GetTable("1.3.6.1.4.1.14823.2.2.1.1.1.9",
SnmpVersion.Three,
null,
new Security()
{
AuthenticationPassword = "mypassword1",
AuthenticationProtocol = AuthenticationProtocol.Md5,
PrivacyPassword = "mypassword2",
PrivacyProtocol = PrivacyProtocol.Des
},
new IPEndPoint(IPAddress.Parse(address), 161),
0);
}catch(Exception ez)
{
}
}
This is supposed to return a set of records from given OID. but It does not return me anything. When I use MIB Browser, I see GetBulk operation fetches all the records for me.
But what is wrong with GetTable() here?
I have create web services using Web Api in mvc3,in this i want get the data from json. Json Result like this
{"order": {
"locationid": "1",
"deviceidentifier": "XXXXXXXXXXXXXXXXXXXXXXX",
"ordercontactname": "XXXXXXXXXXXXXXXXXXXXXXX",
"ordercontactphone": "XXXXXXXXXXXXXXXXXXXXXXX",
"ordercontactemail": "XXXXXXXXXXXXXXXXXXXXXXX",
"shipaddress1": "17 Brookfield",
"shipaddress2": "Suite 17",
"shipcity": "Irvine",
"shipstate": "CA",
"shipzipcode": "92604",
"shipphonenumber": "9493742114",
"shipemail": "Info#mail.com",
"shipmethod": "pickup",
"billingfirstname":"Tester",
"billinglastname":"test",
"billingmiddleinitial":"S",
"billingaddress":"field",
"billingcity":"Sample",
"billingstate":"SM",
"billingzipcode":"523201",
"billingphonenumber": "1234567891",
"billingemail": "",
"paytype":"creditcard",
"amount"="10.50",
"acctno"="123456789987",
"exproute"="0114",
"coupon"="X2323",
"notes"="",
"items": [
{"itemid":"1","quantity":"1","price":"2.5","notes":"make it spicy"},
{"itemid":"4","quantity":"2","price":"4.5","notes":""},
{"itemid":"3","quantity":"1","price":"1.5","notes":""}
]
}}
for this i have create Poco class and i get Order data using poco class, but i can't get the items array data how can i get items data
Here is my code
public List<Message> PlaceOrder(PlaceOrder order)
{
// List<PlaceOrder> entities = (List<PlaceOrder>)JavaScriptConvert.DeserializeObject(json, typeof(List<PlaceOrder>));
int PayOrderID = 0;
List<Message> Result;
Result = new List<Message>();
try
{
Order objOrder = new Order();
PayHist objPayhis = new PayHist();
objOrder.LocationId = order.LocationId;
objOrder.DeviceIdentifier = order.DeviceIdentifier;
objOrder.OrderContactName = order.OrderContactName;
objOrder.OrderContactPhone = order.OrderContactPhone;
objOrder.OrderContactEmail = order.OrderContactEmail;
string guid = Guid.NewGuid().ToString();
objOrder.ShipMethod = order.ShipMethod;
objOrder.ShippingDate = Convert.ToDateTime(order.PickupDate);
objOrder.OrderGuid = guid;
entities.AddObject("Orders", objOrder);
entities.SaveChanges();
int orderId = objOrder.OrderId;
PayOrderID = orderId;
objPayhis.OrderId = orderId;
objPayhis.PayType = order.ShipMethod;
objPayhis.Amount = float.Parse(order.Amount);
entities.AddObject("PayHists", objPayhis);
entities.SaveChanges();
JavaScriptSerializer ser = new JavaScriptSerializer();
// Order foo = ser.Deserialize<Order>(json);
Message objMessage = new Message();
objMessage.Messagevalue = "Sucess";
Result.Add(objMessage);
return Result;
}
Please help me..
Try this (you need to fix your Json by replacing the "=" signs by ":" signs" before):
[WebInvoke(Method = "POST", UriTemplate = "")]
public HttpResponseMessage Add(JsonValue json) {
JsonValue order = json["order"];
JsonArray items = (JsonArray) order["items"];
JsonValue item1 = items[0];
var notes1 = item1["notes"];
return new HttpResponseMessage(HttpStatusCode.OK);
}