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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.debug;
import static com.yahoo.protect.Validator.ensureNotNull;
import com.yahoo.jrt.Request;
import com.yahoo.jrt.StringValue;
import com.yahoo.jrt.Value;
import com.yahoo.yolean.Exceptions;
import com.yahoo.search.handler.SearchHandler;
import com.yahoo.search.searchchain.SearchChain;
import com.yahoo.search.searchchain.SearchChainRegistry;
/**
* Outputs a human readable representation of a given search chain.
*
* @author tonytv
*/
final class OutputSearchChain implements DebugMethodHandler {
private String getSearchChainName(Request request) {
final int numParameters = request.parameters().size();
if (numParameters == 0)
return SearchHandler.defaultSearchChainName;
else if (numParameters == 1)
return request.parameters().get(0).asString();
else
throw new RuntimeException("Too many parameters given.");
}
private SearchChain getSearchChain(SearchChainRegistry registry, String searchChainName) {
SearchChain searchChain = registry.getComponent(searchChainName);
ensureNotNull("There is no search chain named '" + searchChainName + "'", searchChain);
return searchChain;
}
public JrtMethodSignature getSignature() {
String returnTypes = "" + (char)Value.STRING;
String parametersTypes = "*"; //optional string
return new JrtMethodSignature(returnTypes, parametersTypes);
}
public void invoke(Request request) {
try {
SearchHandler searchHandler = SearcherUtils.getSearchHandler();
SearchChainRegistry searchChainRegistry = searchHandler.getSearchChainRegistry();
SearchChain searchChain = getSearchChain(searchChainRegistry,
getSearchChainName(request));
SearchChainTextRepresentation textRepresentation = new SearchChainTextRepresentation(searchChain, searchChainRegistry);
request.returnValues().add(new StringValue(textRepresentation.toString()));
} catch (Exception e) {
request.setError(1000, Exceptions.toMessageString(e));
}
}
}
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