/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.asakusafw.runtime.core.legacy;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import com.asakusafw.runtime.core.BatchContext;
import com.asakusafw.runtime.core.ResourceConfiguration;
import com.asakusafw.runtime.core.api.BatchContextApi;
import com.asakusafw.runtime.stage.StageConstants;
import com.asakusafw.runtime.util.VariableTable;
/**
* A legacy implementation of context API entry class.
* @since 0.9.0
* @see BatchContext
*/
public class LegacyBatchContext {
/**
* The API of this implementation.
*/
public static final BatchContextApi API = new BatchContextApi() {
@Override
public String get(String name) {
return LegacyBatchContext.get(name);
}
};
static final ThreadLocal<LegacyBatchContext> CONTEXTS = ThreadLocal.withInitial(() -> {
throw new IllegalStateException("BatchContext is not yet initialized (internal error)");
});
private Map<String, String> variables = new HashMap<>();
/**
* Creates a new instance.
* @param variables variable table
* @throws IllegalArgumentException if the parameter is {@code null}
*/
protected LegacyBatchContext(Map<String, String> variables) {
if (variables == null) {
throw new IllegalArgumentException("variables must not be null"); //$NON-NLS-1$
}
this.variables = new HashMap<>(variables);
}
/**
* Returns a value of the context variable (which includes batch arguments).
* @param name the target variable name
* @return the value of the target variable, or {@code null} if it is not defined in this context
* @throws IllegalArgumentException if the parameter is {@code null}
*/
public static String get(String name) {
if (name == null) {
throw new IllegalArgumentException("name must not be null"); //$NON-NLS-1$
}
return CONTEXTS.get().variables.get(name);
}
/**
* Initializes {@link LegacyBatchContext}.
*/
public static class Initializer implements RuntimeResource {
@Override
public void setup(ResourceConfiguration configuration) throws IOException, InterruptedException {
String arguments = configuration.get(StageConstants.PROP_ASAKUSA_BATCH_ARGS, ""); //$NON-NLS-1$
VariableTable variables = new VariableTable(VariableTable.RedefineStrategy.IGNORE);
variables.defineVariables(arguments);
LegacyBatchContext context = new LegacyBatchContext(variables.getVariables());
CONTEXTS.set(context);
}
@Override
public void cleanup(ResourceConfiguration configuration) throws IOException, InterruptedException {
CONTEXTS.remove();
}
}
}