Module com.darkcollective.relix.plan

Package com.darkcollective.relix.plan.internal

Class NoSolverInstalledException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

com.darkcollective.relix.plan.internal.NoSolverInstalledException

All Implemented Interfaces:

Serializable

public final class NoSolverInstalledException
extends RuntimeException

Thrown at plan time when a query needs a mathematical-programming solver and none is installed.

Two operators state a mixed-integer program rather than computing an answer directly: OPTIMIZE, and COVER EXACT. Both are useless without a solver, and both would otherwise discover that deep inside execution, after the inputs had already been read. Reporting it while the plan is being built keeps the failure where the cause is — the runtime's configuration, not the data.

This is a user-facing planning error, not a bug: the fix is to put a solver provider on the module path. Every other operator works without one, which is why the check is per-operator rather than a startup requirement.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
NoSolverInstalledException(String operator)

Method Summary

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

NoSolverInstalledException

public NoSolverInstalledException(String operator)

Parameters:

operator - the operator that needs a solver, named as the user wrote it