@Override
public Object perform(InvocationContext ctx) throws Throwable {
// It's not worth looking up the entry if we're never going to apply the change.
if (valueMatcher == ValueMatcher.MATCH_NEVER) {
successful = false;
return null;
}
MVCCEntry e = (MVCCEntry) ctx.lookupEntry(key);
if (e == null || e.isNull() || e.isRemoved()) {
nonExistent = true;
if (valueMatcher.matches(e, value, null, valueEquivalence)) {
if (e != null) {
e.setChanged(true);
e.setRemoved(true);
}
return isConditional() ? true : null;
} else {
log.trace("Nothing to remove since the entry doesn't exist in the context or it is null");
successful = false;
return false;
}
}
if (!valueMatcher.matches(e, value, null, valueEquivalence)) {
successful = false;
return false;
}
if (this instanceof EvictCommand) {
e.setEvicted(true);
}
return performRemove(e, ctx);
}
