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Watcher: Reduce script cache churn by checking for mustache tags #33978

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merged 4 commits into from
Sep 27, 2018
Merged

Watcher: Reduce script cache churn by checking for mustache tags #33978

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28e2c81
Watcher: Reduce script cache churn by checking for mustache tags
spinscale Sep 24, 2018
beb7906
Merge branch 'master' into 1809-reduce-script-compilation-in-watcher
spinscale Sep 25, 2018
76424f4
review comment: remove check for closed brackets, could be wrong
spinscale Sep 26, 2018
d0eaee4
Merge branch 'master' into 1809-reduce-script-compilation-in-watcher
spinscale Sep 26, 2018
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6 changes: 6 additions & 0 deletions ...watcher/src/main/java/org/elasticsearch/xpack/watcher/common/text/TextTemplateEngine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,12 @@ public String render(TextTemplate textTemplate, Map<String, Object> model) {
String mediaType = compileParams(detectContentType(template));
template = trimContentType(textTemplate);

int indexStartMustacheExpression = template.indexOf("{{");
int indexEndMustacheExpression = template.indexOf("}}");
if (indexStartMustacheExpression == -1 || indexStartMustacheExpression > indexEndMustacheExpression) {
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return template;
}

Map<String, Object> mergedModel = new HashMap<>();
if (textTemplate.getParams() != null) {
mergedModel.putAll(textTemplate.getParams());
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14 changes: 11 additions & 3 deletions .../watcher/src/test/java/org/elasticsearch/xpack/watcher/common/text/TextTemplateTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
import static org.hamcrest.Matchers.notNullValue;
import static org.hamcrest.Matchers.nullValue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;

public class TextTemplateTests extends ESTestCase {
Expand All @@ -47,7 +48,7 @@ public void init() throws Exception {
}

public void testRender() throws Exception {
String templateText = "_template";
String templateText = "{{_template}}";
Map<String, Object> params = singletonMap("param_key", "param_val");
Map<String, Object> model = singletonMap("model_key", "model_val");
Map<String, Object> merged = new HashMap<>(params);
Expand All @@ -72,7 +73,7 @@ public String execute() {
}

public void testRenderOverridingModel() throws Exception {
String templateText = "_template";
String templateText = "{{_template}}";
Map<String, Object> params = singletonMap("key", "param_val");
Map<String, Object> model = singletonMap("key", "model_val");
ScriptType type = randomFrom(ScriptType.values());
Expand All @@ -94,7 +95,7 @@ public String execute() {
}

public void testRenderDefaults() throws Exception {
String templateText = "_template";
String templateText = "{{_template}}";
Map<String, Object> model = singletonMap("key", "model_val");

TemplateScript.Factory compiledTemplate = templateParams ->
Expand All @@ -113,6 +114,13 @@ public String execute() {
assertThat(engine.render(template, model), is("rendered_text"));
}

public void testDontInvokeScriptServiceOnNonMustacheText() {
String input = rarely() ? "}}{{" : "this is my text";
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String output = engine.render(new TextTemplate(input), Collections.emptyMap());
assertThat(input, is(output));
verifyZeroInteractions(service);
}

public void testParser() throws Exception {
ScriptType type = randomScriptType();
TextTemplate template =
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