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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.templates;
import com.yahoo.log.LogLevel;
import com.yahoo.yolean.Exceptions;
import java.io.IOException;
import java.io.Writer;
import java.util.Properties;
import java.util.logging.Logger;
/**
* Delegates to another UserTemplate, but handles any exceptions(except IOException) by logging them.
*
* @author Tony Vaagenes
* @deprecated use a renderer instead
*/
@SuppressWarnings("deprecation")
// TODO: Remove on Vespa 7
@Deprecated // OK (But wait for deprecated handlers in vespaclient-container-plugin to be removed)
public class LogExceptionUserTemplateDelegator<T extends Writer> extends UserTemplate<T> {
private static Logger log = Logger.getLogger(LogExceptionUserTemplateDelegator.class.getName());
private final UserTemplate<T> delegate;
public LogExceptionUserTemplateDelegator(UserTemplate<T> delegate) {
super(LogExceptionUserTemplateDelegator.class.getSimpleName());
this.delegate = delegate;
}
@Override
public Context createContext() {
return delegate.createContext();
}
@Override
public T wrapWriter(Writer writer) {
return delegate.wrapWriter(writer);
}
@Override
public boolean isDefaultTemplateSet() {
return delegate.isDefaultTemplateSet();
}
@Override
public String getSummaryClass() {
return delegate.getSummaryClass();
}
@Override
public String getBoldOpenTag() {
return delegate.getBoldOpenTag();
}
@Override
public String getBoldCloseTag() {
return delegate.getBoldCloseTag();
}
@Override
public String getSeparatorTag() {
return delegate.getSeparatorTag();
}
@Override
public void setSummaryClass(String summaryClass) {
delegate.setSummaryClass(summaryClass);
}
@Override
public void setHighlightTags(String start, String end, String sep) {
delegate.setHighlightTags(start, end, sep);
}
@Override
public String getName() {
return delegate.getName();
}
@Override
public String getMimeType() {
return delegate.getMimeType();
}
@Override
public String getEncoding() {
return delegate.getEncoding();
}
@Override
public Template<T> getTemplate(String templateName) {
throw new UnsupportedOperationException();
}
@Override
public void setTemplate(String templateName, Template<? extends Writer> template) {
throw new UnsupportedOperationException();
}
@Override
public void setTemplateNotNull(String templateName, Template<? extends Writer> template) {
throw new UnsupportedOperationException();
}
/*** Template
@Override
public void <methodName>(Context context, T writer) throws IOException {
try {
delegate.<methodName>(context, writer);
} catch (Exception e) {
handleException(e);
}
}
***/
/*** Begin expanded template for
header, footer, hit, hitFooter, error, noHits, queryContext,
Thanks java, for giving me the opportunely to use copy-paste ***/
@Override
public void header(Context context, T writer) throws IOException {
try {
delegate.header(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void footer(Context context, T writer) throws IOException {
try {
delegate.footer(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void hit(Context context, T writer) throws IOException {
try {
delegate.hit(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void hitFooter(Context context, T writer) throws IOException {
try {
delegate.hitFooter(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void error(Context context, T writer) throws IOException {
try {
delegate.error(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void noHits(Context context, T writer) throws IOException {
try {
delegate.noHits(context, writer);
} catch (Exception e) {
handleException(e);
}
}
@Override
public void queryContext(Context context, T writer) throws IOException {
try {
delegate.queryContext(context, writer);
} catch (Exception e) {
handleException(e);
}
}
/*** End expanded template. ***/
private void handleException(Exception e) throws IOException {
if (e instanceof IOException) {
throw (IOException) e;
} else {
log.log(LogLevel.WARNING, "Exception thrown in " + getName()
+ ": " + Exceptions.toMessageString(e), e);
}
}
UserTemplate<T> getDelegate() {
return delegate;
}
}
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