GuardingDynamicLinker classes. They will typically set them as
prioritized linkers
in the DynamicLinkerFactory they configure for themselves, and maybe also
set some as fallback
linkers to handle language-specific "property not found" etc. conditions.
Consider implementing TypeBasedGuardingDynamicLinker interface
instead of this interface for those linkers that are based on the Java class
of the objects. If you need to implement language-specific type conversions,
have your GuardingDynamicLinker also implement the
GuardingTypeConverterFactory interface.
Languages can export linkers to other language runtimes for
automatic discovery
using a GuardingDynamicLinkerExporter.
| Modifier and Type | Method and Description |
|---|---|
| public GuardedInvocation | Returns: a guarded invocation with a method handle suitable for the arguments, as well as a guard condition that if fails should trigger relinking. Must return null if it can't resolve the invocation. If the returned invocation is unconditional (which is actually quite rare), the guard in the return value can be null. The invocation can also have any number of switch points for asynchronous invalidation of the linkage, as well as aThrowable subclass that describes an expected exception
condition that also triggers relinking (often it is faster to rely on an
infrequent but expected ClassCastException than on an always
evaluated instanceof guard). While the linker must produce an
invocation with parameter types matching those in the call site
descriptor of the link request, it should not try to match the return
type expected at the call site except when it can do it with only the
conversions that lose neither precision nor magnitude, see
LinkerServices#asTypeLosslessReturn(MethodHandle, MethodType) for
further explanation.the object describing the request for linking a
particular invocation linkRequest, LinkerServices linker services linkerServices)Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site. |
| getGuardedInvocation | back to summary |
|---|---|
| public GuardedInvocation getGuardedInvocation(LinkRequest linkRequest, LinkerServices linkerServices) throws Exception Creates a guarded invocation appropriate for a particular invocation with the specified arguments at a call site.
| |