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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.container.search;
import com.yahoo.io.reader.NamedReader;
import com.yahoo.search.pagetemplates.config.PageTemplateXMLReader;
import com.yahoo.config.application.api.ApplicationPackage;
import com.yahoo.search.pagetemplates.PageTemplatesConfig;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
* Owns the page templates to be handed to the qrs nodes.
* Owned by a container cluster.
*
* @author bratseth
*/
public class PageTemplates implements Serializable, PageTemplatesConfig.Producer {
private final List<String> pages = new ArrayList<>();
/** Validates page templates in an application package. The passed readers will be closed. */
public static void validate(ApplicationPackage applicationPackage) {
List<NamedReader> pageTemplateFiles=null;
try {
pageTemplateFiles=applicationPackage.getPageTemplateFiles();
new PageTemplateXMLReader().read(pageTemplateFiles,true); // Parse XML for validation only
}
finally {
NamedReader.closeAll(pageTemplateFiles);
}
}
/** Creates from an application package. The passed readers will be closed. */
public static PageTemplates create(ApplicationPackage applicationPackage) {
List<NamedReader> pageTemplateFiles=null;
try {
pageTemplateFiles=applicationPackage.getPageTemplateFiles();
return new PageTemplates(pageTemplateFiles);
}
finally {
NamedReader.closeAll(pageTemplateFiles);
}
}
// We are representing these as XML rather than a structured config type because the structure
// is not easily representable by config (arbitrary nesting of many types of elements within each other)
// and config<->xml generation will not pull its weight in work and possible bugs.
// The XML content is already validated when we get here.
public PageTemplates(List<NamedReader> readers) {
for (NamedReader pageReader : readers) {
try {
pages.add(contentAsString(pageReader));
} catch (IOException e) {
throw new IllegalArgumentException("Could not read page template '" + pageReader.getName() + "'",e);
}
}
}
@Override
public void getConfig(PageTemplatesConfig.Builder builder) {
for (String page : pages) {
builder.page(page);
}
}
private String contentAsString(Reader pageReader) throws IOException {
BufferedReader bufferedReader=new BufferedReader(pageReader);
StringBuilder b=new StringBuilder();
String line;
while (null!=(line=bufferedReader.readLine())) {
b.append(line);
b.append("\n");
}
return b.toString();
}
@Override
public String toString() {
return pages.toString();
}
/**
* The config produced by this
*
* @return page templates config
*/
public PageTemplatesConfig getConfig() {
PageTemplatesConfig.Builder ptB = new PageTemplatesConfig.Builder();
getConfig(ptB);
return new PageTemplatesConfig(ptB);
}
}
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