本文整理匯總了Java中com.espertech.esper.core.service.EPAdministratorHelper類的典型用法代碼示例。如果您正苦於以下問題：Java EPAdministratorHelper類的具體用法？Java EPAdministratorHelper怎麽用？Java EPAdministratorHelper使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
EPAdministratorHelper類屬於com.espertech.esper.core.service包，在下文中一共展示了EPAdministratorHelper類的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: toExpression
import com.espertech.esper.core.service.EPAdministratorHelper; //導入依賴的package包/類
public static ExprForge toExpression(String hint, StatementContext statementContext) throws ExprValidationException {
String toCompile = "select * from java.lang.Object#time(" + hint + ")";
StatementSpecRaw raw = EPAdministratorHelper.compileEPL(toCompile, hint, false, null,
SelectClauseStreamSelectorEnum.ISTREAM_ONLY, statementContext.getEngineImportService(),
statementContext.getVariableService(),
statementContext.getEngineURI(), statementContext.getConfigSnapshot(),
new PatternNodeFactoryImpl(), new ContextManagementServiceImpl(statementContext.getEngineURI()),
new ExprDeclaredServiceImpl(), new TableServiceImpl());
ExprNode expr = raw.getStreamSpecs().get(0).getViewSpecs()[0].getObjectParameters().get(0);
ExprNode validated = EPLValidationUtil.validateSimpleGetSubtree(ExprNodeOrigin.HINT, expr, statementContext, OAEXPRESSIONTYPE, false);
return validated.getForge();
}
示例2: mapSQLParameters
import com.espertech.esper.core.service.EPAdministratorHelper; //導入依賴的package包/類
private static void mapSQLParameters(FromClause fromClause, StatementSpecRaw raw, StatementSpecMapContext mapContext) {
if ((fromClause == null) || (fromClause.getStreams() == null)) {
return;
}
int streamNum = -1;
for (Stream stream : fromClause.getStreams()) {
streamNum++;
if (!(stream instanceof SQLStream)) {
continue;
}
SQLStream sqlStream = (SQLStream) stream;
List<PlaceholderParser.Fragment> sqlFragments = null;
try {
sqlFragments = PlaceholderParser.parsePlaceholder(sqlStream.getSqlWithSubsParams());
} catch (PlaceholderParseException e) {
throw new RuntimeException("Error parsing SQL placeholder expression '" + sqlStream.getSqlWithSubsParams() + "': ");
}
for (PlaceholderParser.Fragment fragment : sqlFragments) {
if (!(fragment instanceof PlaceholderParser.ParameterFragment)) {
continue;
}
// Parse expression, store for substitution parameters
String expression = fragment.getValue();
if (expression.toUpperCase(Locale.ENGLISH).equals(DatabasePollingViewableFactory.SAMPLE_WHERECLAUSE_PLACEHOLDER)) {
continue;
}
if (expression.trim().length() == 0) {
throw ASTWalkException.from("Missing expression within ${...} in SQL statement");
}
String toCompile = "select * from java.lang.Object where " + expression;
StatementSpecRaw rawSqlExpr = EPAdministratorHelper.compileEPL(toCompile, expression, false, null, SelectClauseStreamSelectorEnum.ISTREAM_ONLY,
mapContext.getEngineImportService(), mapContext.getVariableService(), mapContext.getEngineURI(), mapContext.getConfiguration(), mapContext.getPatternNodeFactory(), mapContext.getContextManagementService(), mapContext.getExprDeclaredService(), mapContext.getTableService());
if ((rawSqlExpr.getSubstitutionParameters() != null) && (rawSqlExpr.getSubstitutionParameters().size() > 0)) {
throw ASTWalkException.from("EPL substitution parameters are not allowed in SQL ${...} expressions, consider using a variable instead");
}
if (rawSqlExpr.isHasVariables()) {
mapContext.setHasVariables(true);
}
// add expression
if (raw.getSqlParameters() == null) {
raw.setSqlParameters(new HashMap<Integer, List<ExprNode>>());
}
List<ExprNode> listExp = raw.getSqlParameters().get(streamNum);
if (listExp == null) {
listExp = new ArrayList<ExprNode>();
raw.getSqlParameters().put(streamNum, listExp);
}
listExp.add(rawSqlExpr.getFilterRootNode());
}
}
}
示例3: mapSQLParameters
import com.espertech.esper.core.service.EPAdministratorHelper; //導入依賴的package包/類
private static void mapSQLParameters(FromClause fromClause, StatementSpecRaw raw, StatementSpecMapContext mapContext)
{
if ((fromClause == null) || (fromClause.getStreams() == null)) {
return;
}
int streamNum = -1;
for (Stream stream : fromClause.getStreams()) {
streamNum++;
if (!(stream instanceof SQLStream)) {
continue;
}
SQLStream sqlStream = (SQLStream) stream;
List<PlaceholderParser.Fragment> sqlFragments = null;
try
{
sqlFragments = PlaceholderParser.parsePlaceholder(sqlStream.getSqlWithSubsParams());
}
catch (PlaceholderParseException e)
{
throw new RuntimeException("Error parsing SQL placeholder expression '" + sqlStream.getSqlWithSubsParams() + "': ");
}
for (PlaceholderParser.Fragment fragment : sqlFragments)
{
if (!(fragment instanceof PlaceholderParser.ParameterFragment)) {
continue;
}
// Parse expression, store for substitution parameters
String expression = fragment.getValue();
if (expression.toUpperCase().equals(DatabasePollingViewableFactory.SAMPLE_WHERECLAUSE_PLACEHOLDER)) {
continue;
}
if (expression.trim().length() == 0) {
throw new ASTWalkException("Missing expression within ${...} in SQL statement");
}
String toCompile = "select * from java.lang.Object where " + expression;
StatementSpecRaw rawSqlExpr = EPAdministratorHelper.compileEPL(toCompile, expression, false, null, SelectClauseStreamSelectorEnum.ISTREAM_ONLY,
mapContext.getEngineImportService(), mapContext.getVariableService(), mapContext.getSchedulingService(), mapContext.getEngineURI(), mapContext.getConfiguration(), mapContext.getPatternNodeFactory(), mapContext.getContextManagementService(), mapContext.getExprDeclaredService());
if ((rawSqlExpr.getSubstitutionParameters() != null) && (rawSqlExpr.getSubstitutionParameters().size() > 0)) {
throw new ASTWalkException("EPL substitution parameters are not allowed in SQL ${...} expressions, consider using a variable instead");
}
if (rawSqlExpr.isHasVariables()) {
mapContext.setHasVariables(true);
}
// add expression
if (raw.getSqlParameters() == null) {
raw.setSqlParameters(new HashMap<Integer, List<ExprNode>>());
}
List<ExprNode> listExp = raw.getSqlParameters().get(streamNum);
if (listExp == null) {
listExp = new ArrayList<ExprNode>();
raw.getSqlParameters().put(streamNum, listExp);
}
listExp.add(rawSqlExpr.getFilterRootNode());
}
}
}