public class ForwardingSearcher extends PingableSearcher
FederationSearcher
Modifier and Type | Field and Description |
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private com.yahoo.component.ComponentSpecification |
target |
Constructor and Description |
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ForwardingSearcher(SearchchainForwardConfig config) |
Modifier and Type | Method and Description |
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private void |
badFill(HitGroup hits) |
private Pong |
badPong() |
private Result |
badResult(Query query) |
private Execution |
createForward(Execution execution) |
void |
fill(Result result,
String summaryClass,
Execution execution)
Fill hit properties with data using the given summary class.
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private ErrorMessage |
noSearchchain() |
Pong |
ping(Ping ping,
Execution execution)
Send a ping request downwards to probe if this searcher chain is in functioning order
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Result |
search(Query query,
Execution execution)
Override this to implement your searcher.
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ensureFilled, getLogger, process, toString
getAnnotatedDependencies, getDefaultAnnotatedDependencies, getDependencies, initDependencies
public ForwardingSearcher(SearchchainForwardConfig config)
public Result search(Query query, Execution execution)
Searcher
Searcher implementation subclasses will, depending on their type of logic, do one of the following:
Hits come in two kinds - concrete hits are actual content of the kind requested by the user, meta hits are hits which provides information about the collection of hits, on the query, the service and so on.
The query specifies a window into a larger result list that must be returned from the searcher through hits and offset; Searchers which returns list of hits in the top level in the result must return at least hits number of hits (or if impossible; all that are available), starting at the given offset. In addition, searchers are allowed to return any number of meta hits (although this number is expected to be low). For hits contained in nested hit groups, the concept of a window defined by hits and offset is not well defined and does not apply.
Error handling in searchers:
public Pong ping(Ping ping, Execution execution)
PingableSearcher
ping
in class PingableSearcher
private Pong badPong()
public void fill(Result result, String summaryClass, Execution execution)
Searcher
This needs to be overridden by federating searchers to contact search sources again by propagating the fill call down through the search chain, and by source searchers which talks to fill capable backends to request the data to be filled. Other searchers do not need to override this.
private void badFill(HitGroup hits)
private ErrorMessage noSearchchain()
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