Predicate Illegal Argument Exception

[Aarti Jivrajani]

Hi,

I am using SQLPredicate in my application. My keys are strings and values are VersionedPortable Objects. 

int
mdns_hazelcast_map_init(void *cache_ctx) {

    HazelcastClient *hazelcastClient = (HazelcastClient *)cache_ctx;
    IMap<std::string, MCIPortable> mci_serv_map = 
        hazelcastClient->getMap<std::string, MCIPortable>(MCI_SERVER_HASH);
    IMap<std::string, FlowPortable> flow_map = 
        hazelcastClient->getMap<std::string, FlowPortable>(FLOW_HASH);
    
    //add indices on the maps for items based on which frequent reads happen
    mci_serv_map.addIndex("cust_id", true); 

    flow_map.addIndex("flow_id", true);
    flow_map.addIndex("cust_id", true);

    return MDNS_DB_OP_OK;

}

The highlighted line gives me the following error : 

terminate called after throwing an instance of 'hazelcast::client::exception::QueryException'

  what():  ExceptionMessage {Error code:42, Class name that generated the error:com.hazelcast.query.QueryException, java.lang.IllegalArgumentException: There is no suitable accessor for 'cust_id' on class 'class java.lang.String'

        ReflectionHelper.java line 176 :com.hazelcast.query.impl.getters.ReflectionHelper.createGetter

        Extractors.java line 125 :com.hazelcast.query.impl.getters.Extractors.instantiateGetter

        Extractors.java line 102 :com.hazelcast.query.impl.getters.Extractors.getGetter

        Extractors.java line 64 :com.hazelcast.query.impl.getters.Extractors.extract

        QueryableEntry.java line 144 :com.hazelcast.query.impl.QueryableEntry.extractAttributeValueFromTargetObject

        QueryableEntry.java line 82 :com.hazelcast.query.impl.QueryableEntry.extractAttributeValue

        QueryableEntry.java line 48 :com.hazelcast.query.impl.QueryableEntry.getAttributeValue

        QueryableEntry.java line 67 :com.hazelcast.query.impl.QueryableEntry.getConverter

        IndexImpl.java line 67 :com.hazelcast.query.impl.IndexImpl.saveEntryIndex

        AddIndexOperation.java line 75 :com.hazelcast.map.impl.operation.AddIndexOperation.run

        OperationRunnerImpl.java line 172 :com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run

        OperationThread.java line 198 :com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.processOperation

        OperationThread.java line 132 :com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.process

        OperationThread.java line 124 :com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.doRun

        OperationThread.java line 99 :com.hazelcast.spi.impl.operationexecutor.classic.OperationThread.run

Cause error code:25

Caused by:java.lang.IllegalArgumentException

} at java.lang.IllegalArgumentException: There is no suitable accessor for 'cust_id' on class 'class java.lang.String'

Program received signal SIGABRT, Aborted.

MCIPortable class has cust_id defined as 

std::auto_ptr<std::string> cust_id;

Please help me out with this issue. 

Thanks, 

Aarti

[Aarti Jivrajani]

I am using the predicate as follows : 

        hazelcast::util::snprintf(cid_buf, 64, "cust_id == %s", cust_id);
        hazelcast::util::snprintf(bssid_buf, 64, "bssid == %s", bssid);
            
        std::auto_ptr<query::Predicate> cust_id_pred = std::auto_ptr<query::Predicate>(new hazelcast::client::query::SqlPredicate(cid_buf));
        std::auto_ptr<query::Predicate> bssid_pred = std::auto_ptr<query::Predicate>(new hazelcast::client::query::SqlPredicate(bssid_buf));
            
        //returns a vector of MCIPortable obj for a particular cid and bssid
        std::vector<MCIPortable> cid_bssid_required_values = cid_mci_map.values(query::AndPredicate().add(cust_id_pred).add(bssid_pred));

[Peter Veentjer]

You are trying to get a cust_id from a String class according to the error.

What is the content of that map? It appears to have strings in them and not customers.

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[Aarti Jivrajani]

String cust_id is one the private members of the VersionedPortbale class called MCIPortable.

So the map key is a string and the value is MCIPortable with data members cust_id and two other strings.