org.glassfish.grizzly.filterchain.ExecutorResolver Maven / Gradle / Ivy
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package org.glassfish.grizzly.filterchain;
import java.io.IOException;
/**
*
* @author oleksiys
*/
abstract class ExecutorResolver {
public static final FilterExecutor UPSTREAM_EXECUTOR_SAMPLE = new UpstreamExecutor() {
@Override
public NextAction execute(Filter filter, FilterChainContext context) throws IOException {
throw new UnsupportedOperationException("Not supported yet.");
}
};
public static final FilterExecutor DOWNSTREAM_EXECUTOR_SAMPLE = new DownstreamExecutor() {
@Override
public NextAction execute(Filter filter, FilterChainContext context) throws IOException {
throw new UnsupportedOperationException("Not supported yet.");
}
};
private static final FilterExecutor CONNECT_EXECUTOR = new UpstreamExecutor() {
@Override
public NextAction execute(final Filter filter, final FilterChainContext context)
throws IOException {
return filter.handleConnect(context);
}
};
private static final FilterExecutor CLOSE_EXECUTOR = new UpstreamExecutor() {
@Override
public NextAction execute(final Filter filter, final FilterChainContext context)
throws IOException {
return filter.handleClose(context);
}
};
private static final FilterExecutor EVENT_UPSTREAM_EXECUTOR = new UpstreamExecutor() {
@Override
public NextAction execute(final Filter filter,
final FilterChainContext context) throws IOException {
return filter.handleEvent(context, context.event);
}
};
private static final FilterExecutor EVENT_DOWNSTREAM_EXECUTOR = new DownstreamExecutor() {
@Override
public NextAction execute(final Filter filter,
final FilterChainContext context) throws IOException {
return filter.handleEvent(context, context.event);
}
};
private static final FilterExecutor ACCEPT_EXECUTOR = new UpstreamExecutor() {
@Override
public NextAction execute(final Filter filter, final FilterChainContext context)
throws IOException {
return filter.handleAccept(context);
}
};
private static final FilterExecutor WRITE_EXECUTOR = new DownstreamExecutor() {
@Override
public NextAction execute(final Filter filter, final FilterChainContext context)
throws IOException {
return filter.handleWrite(context);
}
};
private static final FilterExecutor READ_EXECUTOR = new UpstreamExecutor() {
@Override
public NextAction execute(final Filter filter, final FilterChainContext context)
throws IOException {
return filter.handleRead(context);
}
};
public static FilterExecutor resolve(final FilterChainContext context) {
switch(context.getOperation()) {
case READ: return READ_EXECUTOR;
case WRITE: return WRITE_EXECUTOR;
case ACCEPT: return ACCEPT_EXECUTOR;
case CLOSE: return CLOSE_EXECUTOR;
case CONNECT: return CONNECT_EXECUTOR;
case EVENT: return (context.getFilterIdx() == FilterChainContext.NO_FILTER_INDEX ||
context.getStartIdx() <= context.getEndIdx()) ?
EVENT_UPSTREAM_EXECUTOR:
EVENT_DOWNSTREAM_EXECUTOR;
default: return null;
}
}
/**
* Executes appropriate {@link Filter} processing method to process occurred
* {@link org.glassfish.grizzly.IOEvent}.
*/
public static abstract class UpstreamExecutor implements FilterExecutor {
@Override
public final int defaultStartIdx(FilterChainContext context) {
if (context.getFilterIdx() != FilterChainContext.NO_FILTER_INDEX) {
return context.getFilterIdx();
}
context.setFilterIdx(0);
return 0;
}
@Override
public final int defaultEndIdx(FilterChainContext context) {
return context.getFilterChain().size();
}
@Override
public final int getNextFilter(FilterChainContext context) {
return context.getFilterIdx() + 1;
}
@Override
public final int getPreviousFilter(FilterChainContext context) {
return context.getFilterIdx() - 1;
}
@Override
public final boolean hasNextFilter(FilterChainContext context, int idx) {
return idx < context.getFilterChain().size() - 1;
}
@Override
public final boolean hasPreviousFilter(FilterChainContext context, int idx) {
return idx > 0;
}
@Override
public final void initIndexes(FilterChainContext context) {
final int startIdx = defaultStartIdx(context);
context.setStartIdx(startIdx);
context.setFilterIdx(startIdx);
context.setEndIdx(defaultEndIdx(context));
}
@Override
public final boolean isUpstream() {
return true;
}
@Override
public final boolean isDownstream() {
return false;
}
}
/**
* Executes appropriate {@link Filter} processing method to process occurred
* {@link org.glassfish.grizzly.IOEvent}.
*/
public static abstract class DownstreamExecutor implements FilterExecutor {
@Override
public final int defaultStartIdx(FilterChainContext context) {
if (context.getFilterIdx() != FilterChainContext.NO_FILTER_INDEX) {
return context.getFilterIdx();
}
final int idx = context.getFilterChain().size() - 1;
context.setFilterIdx(idx);
return idx;
}
@Override
public final int defaultEndIdx(FilterChainContext context) {
return -1;
}
@Override
public final int getNextFilter(FilterChainContext context) {
return context.getFilterIdx() - 1;
}
@Override
public final int getPreviousFilter(FilterChainContext context) {
return context.getFilterIdx() + 1;
}
@Override
public final boolean hasNextFilter(FilterChainContext context, int idx) {
return idx > 0;
}
@Override
public final boolean hasPreviousFilter(FilterChainContext context, int idx) {
return idx < context.getFilterChain().size() - 1;
}
@Override
public final void initIndexes(FilterChainContext context) {
final int startIdx = defaultStartIdx(context);
context.setStartIdx(startIdx);
context.setFilterIdx(startIdx);
context.setEndIdx(defaultEndIdx(context));
}
@Override
public final boolean isUpstream() {
return false;
}
@Override
public final boolean isDownstream() {
return true;
}
}
}