Class FallbackSolver
Wraps two solvers always passing requests to the primary one initially and falling back to secondary one should the primary one fail.
Implements
Namespace: ZeroInstall.Services.Solvers
Assembly: ZeroInstall.Services.dll
Syntax
public sealed class FallbackSolver : Object, ISolverRemarks
This class is immutable and thread-safe.
Constructors
FallbackSolver(ISolver, ISolver)
Declaration
public FallbackSolver(ISolver primarySolver, ISolver secondarySolver)Parameters
| Type | Name | Description |
|---|---|---|
| ISolver | primarySolver | |
| ISolver | secondarySolver |
Methods
Solve(Requirements)
Provides Selections that satisfy a set of Requirements.
Declaration
public Selections Solve(Requirements requirements)Parameters
| Type | Name | Description |
|---|---|---|
| Requirements | requirements | The requirements to satisfy. |
Returns
| Type | Description |
|---|---|
| Selections | The selected ImplementationSelections. |
Remarks
Feed files may be downloaded, signature validation is performed, implementations are not downloaded.
Exceptions
| Type | Condition |
|---|---|
| OperationCanceledException | The user canceled the task. |
| ArgumentException |
|
| IOException | A problem occurred while reading the feed file. |
| WebException | A problem occurred while fetching the feed file. |
| UnauthorizedAccessException | Access to the cache is not permitted. |
| SignatureException | The signature data of a remote feed file could not be verified. |
| SolverException | The solver was unable to provide Selections that fulfill the |